sphaeriid
Any in the family Sphaeriidae of clams.

sphaeriids
plural of sphaeriid

sphaeronectid
Any siphonophore of the family Sphaeronectidae

sphaeronectids
plural of sphaeronectid

sphagesaurid
Any mesoeucrocodylian of the family Sphagesauridae

sphagesaurids
plural of sphagesaurid

sphenacodontian
Any synapsid of the clade Sphenacodontia.

sphenacodontians
plural of sphenacodontian

sphenacodontid
Any synapsid in the family Sphenacodontidae.

sphenacodontids
plural of sphenacodontid

spheniciform
Misspelling of sphenisciform.

spheniscan
Any banded penguin of genus Spheniscus

spheniscans
plural of spheniscan

sphenisciform
Any penguin of the order Sphenisciformes

sphenisciforms
plural of sphenisciform

sphenopid
Any zoanthid in the family Sphenopidae.

sphenopids
plural of sphenopid

spherobacteria
spherical bacteria, such as those in the genus Micrococcus.

sphingobacteria
plural of sphingobacterium

sphingobacterium
Any bacterium of the class Sphingobacteria

sphingomonad
Any bacterium of the order Sphingomonadales, or more specifically, of the genus Sphingomonas

sphingomonads
plural of sphingomonad

sphyraenid
Any barracuda in the family Sphyraenidae.

sphyraenids
plural of sphyraenid

spiderhunter
A large Asian sunbird of the genus Arachnothera, feeding on nectar and a range of small arthropods.

spiderhunters
plural of spiderhunter

spinebill
Either of the Australian birds of the genus Acanthorhynchus, types of honeyeaters.

spinebills
plural of spinebill

spinetail
Any of several species of swifts of Apodinae, having shafts of the tailfeathers terminate in rigid spines.
Any of several species of South American and Central American clamatorial birds belonging to Synallaxis and allied genera of the ovenbird family Furnariidae.
A ruddy duck (Oxyura jamaicensis).

spinetails
plural of spinetail

spirillum
Any of various aerobic bacteria of the genus Spirillum, having an elongated spiral form and bearing a tuft of flagella.
Any of various other spiral-shaped microorganisms.

spirillums
plural of spirillum

spirochaete
Alternative spelling of spirochete.

spirochaetes
plural of spirochaete

spirochete
Any of several coiled bacteria of the order Spirochaetales, most of which are pathogenic to both humans and other animals.

spirochetes
plural of spirochete

spirocyst
Any protozoan of the genus Spirocystis

spirocysts
plural of spirocyst

spirofilid
Any ciliate protozoan of the family Spirofilidae

spirofilids
plural of spirofilid

spiroplasma
Any bacterium of the genus Spiroplasma.

spiroplasmas
plural of spiroplasma

spiroplectamminid
Any foram in the family Spiroplectamminidae.

spiroplectamminids
plural of spiroplectamminid

spirorchid
Any trematode of the family Spirorchiidae.

spirorchids
plural of spirorchid

spirorchiid
Any trematode in the family Spirorchiidae.

spirorchiids
plural of spirorchiid

spiruromorph
Any nematode of the infraorder Spiruromorpha

spiruromorphs
plural of spiruromorph

spissati
plural of spissatus

spissatus
A cloud species which consists of dense, high level strands, which can haze, or block the sun. Associated only with cirrus formations.

spodoptericin
A defensin present in moths of the genus Spodoptera infected with bacteria

spodoptericins
plural of spodoptericin

spoligoforest
A graphical representation of the spoligotypes of bacteria

spoligoforests
plural of spoligoforest

spongivore
Any organism that feeds on sponges

spongivores
plural of spongivore

spongodiscid
Any radiolarian in the family Spongodiscidae.

spongodiscids
plural of spongodiscid

sporange
A sporangium.

sporanges
plural of sporange

sporangiogenesis
The creation and development of the sporangium

sporangiole
A fungal spore that is not enclosed by a sporangium

sporangioles
plural of sporangiole

sporoderm
The wall or covering of a spore.

sporodermis
Synonym of sporoderm.

sporoderms
plural of sporoderm

sporolide
Any of a group of polycyclic macrolides produced by the marine bacterium Salinispora tropica

sporolides
plural of sporolide

sporophyl
Alternative form of sporophyll.

sporophyll
The equivalent to a leaf, in ferns and mosses, that bears the sporangia.

sporophylls
plural of sporophyll

sporophyls
plural of sporophyl

sporoplasm
The protoplasm of a spore, particularly in the myxospores.

sporoplasms
plural of sporoplasm

springsnail
Any of the genus Pyrgulopsis of freshwater snails.

springsnails
plural of springsnail

sprivivirus
Any rhabdovirus of the genus Sprivivirus

spriviviruses
plural of sprivivirus

spumellarian
Any radiolarian of the order Spumellaria.

spumellarians
plural of spumellarian

squilloid
A member of that taxonomic family Squillidae.

squilloids
plural of squilloid

stabilism
Synonym of fixism.

stabilomorphism
The survival of one species out of many in a mass extinction

staffellid
Any foraminifer of the family Staffellidae

staffellids
plural of staffellid

stagnicoline
Any of the genus Stagnicola of freshwater snails.

stagnicolines
plural of stagnicoline

stagonolepidid
Any archosaur in the family Stagonolepididae.

stagonolepidids
plural of stagonolepidid

staphylolysin
A hemolysin produced by a staphylococcus bacteria

starfrontlet
Any of several species of South American hummingbirds in the genus Coeligena.

starfrontlets
plural of starfrontlet

statospore
A resting spore formed in the frustules of various marine diatoms

statospores
plural of statospore

staurospore
A septate fungal spore in the form of a pinwheel.

staurospores
plural of staurospore

stephanoberycid
Any pricklefish in the family Stephanoberycidae.

stephanoberycids
plural of stephanoberycid

stereome
A section of sclerenchyma at the base of a phyllary in some members of the Asteraceae.
sclerenchyma

stereomes
plural of stereome

sternophorid
Any pseudoscorpion in the family Sternophoridae.

sternophorids
plural of sternophorid

stichotrich
Any ciliate of the subclass Stichotrichia

stichotrichine
Any ciliate of the subclass Stichotrichia

stichotrichines
plural of stichotrichine

stichotrichs
plural of stichotrich

stoloniferan
Any octocoral of the suborder Stolonifera.

stoloniferans
plural of stoloniferan

stramenopile
A heterokont of the clade (sometimes a superphylum) Stramenopiles.

streptobacilli
plural of streptobacillus

streptobacillus
Any bacterium of the genus Streptobacillus.

streptobacteria
plural of streptobacterium

streptobacterium
A supposed variety of bacterium, consisting in reality of several bacteria, for example, Lactobacillus, linked together to form a chain.

streptomycete
Any bacterium of the family Streptomycetaceae

streptomycetes
plural of streptomycete

streptophyte
Any of a very large group of organisms, of the division Streptophytina, which includes the green algae and most other plants.

streptophytes
plural of streptophyte

strigeid
Any trematode of the family Strigeidae

strigeids
plural of strigeid

stromateiform
Any butterfish of the order Stromateiformes

stromateiforms
plural of stromateiform

strombid
Any conch in the family Strombidae.

strombidiid
Any ciliate of the family Strombidiidae or order Strombidiida

strombidiids
plural of strombidiid

strombids
plural of strombid

stubtail
Any of the three species of passerine birds in the genus Urosphena, native to Asia.

stubtails
plural of stubtail

studfish
Any of several species of small American minnows of the genus Fundulus, such as Fundulus catenatus.

studfishes
plural of studfish

styelid
Any in the family Styelidae of tunicates.

styelids
plural of styelid

stygiobiont
Any organism that lives in permanent darkness, typically in deep caves

stygiobionts
plural of stygiobiont

stylasterid
Any hydrozoan of the family Stylasteridae

stylasterids
plural of stylasterid

stylasterine
Any hydrozoan of the order Stylasterina.

stylocellid
Any harvestman of the family Stylocellidae.

stylocellids
plural of stylocellid

stylonurid
Any eurypterid of the family †Stylonuridae.

stylonurids
plural of stylonurid