Simplex (disambiguation)

Simplex is Latin for "simple, pure, plain" and may refer to:

Mathematics

• Pascal's simplex, a version of Pascal's triangle of more than three dimensions
• Simplex, a term in geometry meaning an n-dimensional analogue of a triangle
  • 10-simplex, a hendecaxennon (self-dual regular 10-polytope)
  • Omnitruncated 6-simplex or omnitruncated heptapeton (uniform 6-polytope)
• Simplex algorithm, a popular algorithm for numerical solution of linear programming problems
• Simplex graph
• Simplex noise, a method for constructing an n-dimensional noise function
• Simplex plot, a ternary plot used in game theory

Companies and trade names

• American Simplex, an American automobile made in Mishawaka, Indiana, USA
• Crane-Simplex, a defunct luxury car manufacturer in New York, USA at the start of the 20th century
• Simplex (bicycle), a French bicycle derailleur brand
• Simplex Manufacturing Corporation, an American manufacturer of motorcycles in Louisiana from 1935 to 1975
• Simplex, a trade name used by British railway locomotive manufacturers, The Motor Rail & Tramcar Co Ltd
• Simplex, the trade name of the swinging-tray record changer used in Wurlitzer jukeboxes, produced from the 1930s to the 1950s.
• Simplex Time Recorder Company, the former name of a brand of fire protection products, now known as SimplexGrinnell
• Sheffield-Simplex, a British vehicle manufacturer operating 1907–1920

Technology

• Bergmann Simplex, an early 20th-century, German–made handgun
• Simplex circuit provides transmission in one direction only
• Simplex communication, a one-way communications channel
• Simplex signaling, signalling in which two conductors are used for a single channel
• In amateur radio, using a single frequency for transmit and receive instead of a repeater
• Simplex, a brand name used by the Motor Rail company, early builders of small railway locomotives powered by petrol engines
• Simplex lock, a five-digit push-button mechanical lock

Biology

Simplex is commonly used in binomial names.

• Acacia simplex, perennial climbing tree native to islands in the western part of the Pacific Ocean
• Acartia simplex, a species of marine copepod belonging to the family Acartiidae
• Achaea simplex, a species of moth of the family Noctuidae
• Acrodontium simplex, ascomycete fungus that is a plant pathogen
• Aloeides simplex, a butterfly of the family Lycaenidae
• Amitostigma simplex, a species of plant in the family Orchidaceae
• Anabrus simplex or Mormon cricket, large insect that can grow to almost three inches in length
• Anatrachyntis simplex, moth in the family Cosmopterigidae
• Anomia simplex, or the common jingle shell, a species of bivalve mollusc in the family Anomiidae
• Anthreptes simplex or plain sunbird, a species of bird in the family Nectariniidae
• Argiope simplex or Argiope trifasciata, also called banded garden spider in the USA, a species of spider found around the world
• Arinia simplex, a species of small land snails with an operculum, terrestrial gastropod mollusks in the family Diplommatinidae
• Asconiscus simplex, the only species in the genus Asconiscus, family of marine isopod crustaceans in the suborder Cymothoida
• Avatha simplex, a species of moth of the family Noctuidae
• Azygophleps simplex, moth in the family Cossidae
• Betta simplex, a species of fish in the family Osphronemidae
• Bittium simplex, a species of sea snail, a marine gastropod mollusk in the family Cerithiidae
• Blanfordia simplex, a species of land snail that has an operculum, a terrestrial gastropod mollusk in the family Pomatiopsidae
• Boucardicus simplex, a species of land snail with an operculum, a terrestrial gastropod mollusk in the family Cyclophoridae
• Branchinella simplex, a species of crustacean in the family Thamnocephalidae
• Brassaiopsis simplex, a species of plant in the family Araliaceae
• Buddleja simplex, probably extinct, as no record of it has been made for nearly 200 years
• Bulbophyllum simplex, a species of orchid in the genus Bulbophyllum
• Calamonastes simplex or grey wren warbler, a species of bird in the family Cisticolidae
• Calliostoma simplex, a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae
• Chilo simplex or Chilo suppressalis, moth of the family Crambidae
• Chlaenius simplex, a ground beetle in the large and diverse genus Chlaenius
• Chlorocichla simplex or simple greenbul, a species of songbird in the family Pycnonotidae
• Cirsonella simplex, minute sea snail, a marine gastropod mollusc in the family Turbinidae
• Coelogyne simplex, a species of orchid
• Coleophora simplex, moth of the family Coleophoridae
• Columba simplex or lemon dove or cinnamon dove, a bird species in the pigeon family (Columbidae)
• Cristilabrum simplex, a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae
• Cyligramma simplex, moth of the family Noctuidae
• Digamasellus simplex, mite in the family Digamasellidae
• Echium simplex (Tower of jewels), herbaceous biennial plant up to 3 m in height on the island of Tenerife mainly in Macizo de Anaga
• Enatimene simplex, a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails
• Endotricha simplex, a species of snout moths in the genus Endotricha
• Eriogaster simplex or Panacela lewinae is a moth of the family Eupterotidae
• Eulimella simplex, a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies
• Eulophota simplex, a species of snout moths in the genus Eulophota
• Firmiana simplex, the Chinese parasol tree or wutong, an ornamental plant or tree of the cacao, or chocolate family Sterculiaceae of the order Malvales, native to Asia
• Gamasellus simplex, in the genus of mites in the family Ologamasidae
• Gentianopsis simplex, a species of flowering plant in the gentian family known by the common name oneflower fringed gentian
• Geoffroyus simplex, blue-collared parrot, simple parrot, lilac-collared song parrot, or lilac-collared Geoffroy's parrot, found in New Guinea
• Halolaelaps simplex, family of mites in the order Mesostigmata
• Hemistola simplex, moth of the family Geometridae
• Hesperomys simplex, a species of rodent in the family Cricetidae from south-central South America
• Holcobius simplex, beetle species in the family Anobiidae
• Hyla simplex, a species of frog in the family Hylidae
• Janoliva simplex, a species of sea snail, a marine gastropod mollusk in the family Olividae, the olives
• Melanophryniscus simplex, a species of toad in the family Bufonidae
• Mirosternus simplex, beetle species in the family Anobiidae
• Mohnia simplex, a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks
• Myrmothera simplex or tepui antpitta or brown-breasted antpitta, a species of bird in the family Formicariidae
• Natica simplex, a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails
• Nemiana simplex, the only species in Nemiana, a genus of simple, sessile organisms
• Obesotoma simplex, a species of sea snail, a marine gastropod mollusk in the family Mangeliidae
• Oenocarpus simplex, a species of flowering plant in the family Arecaceae
• Opisthostoma simplex, a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae
• Oroplema simplex, a species of moth of the family Uraniidae
• Ovatis simplex, a species of crabs in the family Xanthidae, the only species in the genus Ovatis
• Pachycephala simplex or grey whistler, a species of bird in the family Pachycephalidae
• Paradiaptomus simplex, a species of copepod in the family Diaptomidae
• Passer simplex or desert sparrow, a bird of the sparrow family Passeridae
• Penicillaria simplex, moth of the family Noctuidae
• Pepta simplex, a species of sea snail, a marine gastropod mollusk in the family Cancellariidae, the nutmeg snails
• Phaetusa simplex or large-billed tern, a species of tern in the family Sternidae
• Piculus simplex or Rufous-winged Woodpecker, a species of bird in the family Picidae
• Pleomeris simplex or Puccinia hordei, plant pathogen
• Plusia simplex or Anagrapha falcifera, a moth of the family Noctuidae
• Pogoniulus simplex or green tinkerbird, a species of bird in the family Lybiidae
• Protanthea simplex, a species of sea anemone found in deep water off the coasts of north west Europe
• Proutiella simplex, moth of the family Notodontidae
• Pseudopanax simplex, a species of evergreen plant
• Pseudotriccus simplex or hazel-fronted pygmy tyrant, a species of bird in the family Tyrannidae
• Puccinellia simplex, a species of grass known by the common names western alkali grass and California alkali grass
• Pycnonotus simplex or cream-vented bulbul, a species of songbird in the family Pycnonotidae
• Pyrgulopsis simplex or fossil springsnail, a species of minute freshwater spring snails, aquatic gastropod mollusks or micromollusks in the family Hydrobiidae
• Rhadinosticta simplex or Rhadinosticta, a species of damselfly in the family Isostictidae
• Rhamphomyia simplex, a species of dance fly, in the fly family Empididae
• Rhytipterna simplex or greyish mourner, a species of bird in the family Tyrannidae
• Sarcoglanis simplex, a species of catfish (order Siluriformes) of the family Trichomycteridae, and the only species of the genus Sarcoglanis
• Schinia simplex, moth of the family Noctuidae
• Schrankia simplex or Schrankia altivolans, moth of the family Noctuidae
• Serrata simplex, a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails
• Speiredonia simplex, a species of moth of the family Noctuidae
• Sporophila simplex or drab seedeater, a species of bird in the family Thraupidae
• Stirlingia simplex, plant endemic to Western Australia
• Sukashitrochus simplex or Sukashitrochus morleti, a species of sea snail, a marine gastropod mollusk in the family Scissurellidae
• Thesprotia simplex, common name grass mantis, is a species of praying mantis found in Brazil
• Tropodiaptomus simplex, copepod in the family Diaptomidae
• Tubularia simplex, or oaten pipes hydroid, a species of large hydroid native to the northeast Atlantic Ocean, the North Sea, Norwegian Sea, and the English Channel
• Urophora simplex, a species of tephritid or fruit flies in the genus Urophora of the family Tephritidae
• Utricularia simplex, commonly known as bluecoats, is a very small perennial carnivorous plant that belongs to the genus Utricularia
• Vriesea simplex, a species of the genus Vriesea

Other

• Mercedes Simplex, an automobile model produced between 1902 and 1909
• Herpes simplex is a viral disease caused by Herpes simplex viruses
• Simplex printing, a printing technique that is contrast to duplex printing