sunset shell
A marine bivalve (Tellina radiata) found in the Caribbean, having a smooth shell marked with radiating bands of varied colours.

superhelices
plural of superhelix

superhelix
The shape formed by a helix which in turn is twisted into a larger helix

superhelixes
plural of superhelix

supermoduli
plural of supermodulus

surf clam
Spisula solida, is a medium-sized marine clam found around the British and Irish coasts.
Spisula sachalinense or Mactromeris polynyma, clams commonly used in sushi.

surf clams
plural of surf clam

surrealia
Subjects or objects of a surreal quality or nature.
Something that evokes a surreal quality or atmosphere.

swan mussel
a large freshwater mussel of species Anodonta cygnea, in family Unionidae.

symblepharonlysis
The breaking down of a symblepharon, usually by mechanical means.

sympatholysis
Opposition to the stimulation of the sympathetic nervous system

synechialysis
Misspelling of synechiolysis.

synechiolysis
Correction of a synechia

syntagm
Alternative form of syntagma.

syntagma
A constituent segment within a text, such as a word or a phrase that forms a syntactic unit.
An arrangement of units that together bears a meaning.
A Macedonian phalanx fighting formation consisting of 256 men with long spears (sarissae).
An organized structural, functional unit of anatomical or chemical subunits.
A treatise or compendium.

syntagmas
plural of syntagma

syntagmata
plural of syntagma

syntagms
plural of syntagm

syringes
plural of syringe

syrinx
A set of panpipes.
Chiefly in the plural: a narrow channel cut in rock, especially in Ancient Egyptian burial chambers.
Any of several abnormal tube-shaped structures in the body, especially a rare, fluid-filled neuroglial cavity in the brain stem or within the spinal cord.
The voice organ in birds, located at or near where the trachea and the bronchi join.

syrinxes
plural of syrinx

systrum
Obsolete form of sistrum.

tachyphrasia
tachyphemia

tadpole physa
Physella gyrina (or Physa gyrina), a freshwater snail endemic to North America.

tahua
A pile of food presented as a gift.

takia
A kind of outrigger canoe used in Fiji.

takias
plural of takia

talisman
A magical object providing protection against ill will, or the supernatural, or conferring the wearer with a boon such as good luck, good health, or power(s).

talismans
plural of talisman

talismen
plural of talisman

tapes
plural of tape

taphon
A type of double-headed barrel drum used in Thailand.

taras
plural of tara

tarphycones
plural of tarphycone

tatara
A traditional Japanese furnace for smelting iron and steel.

tataras
plural of tatara

tegula
A small sclerite situated above the base of the costal vein in the wings of various insects, and attached to the anterolateral portion of the mesonotum.
A flat Roman roof tile with raised edges, joined together by an imbrex.
Any sea snail in the genus Tegula.

tegulae
plural of tegula

telecopier
Synonym of fax machine.

telecopiers
plural of telecopier

telelenses
plural of telelens

teloconch
Misspelling of teleoconch.

terebra
The ovipositor of a female hymenopteran, that pierces.
An Ancient Roman engine for making a breach in a wall.
A type of trepan.

terebrae
plural of terebra

terebras
plural of terebra

teredo
A mollusc of the genus Teredo, especially of species Teredo navalis.

teredoes
plural of teredo

teredos
plural of teredo

teschenites
plural of teschenite

testacea
Any of various shellfish, especially those of the obsolete orders Vermes or Acephala, or the suborder Thecosomata.

textile cone
An attractive cone shell (Conus textile) in which the colours are arranged so that they resemble certain kinds of cloth, found in the Indo-Pacific.

theologoumena
plural of theologoumenon

theologoumenon
A theological statement which is of individual opinion and not doctrine.

thersites
plural of thersite

theta
The eighth letter of the Modern Greek alphabet, ninth in Old Greek: Θ, θ.
The measure of an angle.
Pitch angle; the angle between an aircraft's longitudinal axis and the horizontal plane.
The sensitivity of the value of a derivative with respect to time; the "time decay".
Designating a level of brain activity as measured by electroencephalography having a frequency of between four and seven cycles per second (associated with drowsiness in adults).
The voiceless dental fricative represented by θ.

thetas
plural of theta

thetatron
Synonym of theta pinch.

thetatrons
plural of thetatron

tholi
plural of tholus

tholus
A small domical mountain or hill.
A round building, dome, or cupola.
Part of the apical structure of the asci of some lichen species.

thorny oyster
Any of the spiny bivalve molluscs of the genus Spondylus.

thraciids
plural of thraciid

thrombolysis
The breaking down of blood clots by pharmacological or other means.

tiara
The three-tiered papal crown.
An ornamental coronet.

tiarae
plural of tiara

tiaras
plural of tiara

tib
A tibia.

tibia
The inner and usually the larger of the two bones of the leg or hind limb below the knee, the shinbone.
The second segment from the end of an insect's leg, between the femur and tarsus.
The third segment from the end of an arachnid's leg, between the patella and metatarsus.
A musical instrument of the flute kind, originally made of the leg bone of an animal.

tibiae
plural of tibia

tibias
plural of tibia

tibs
plural of tib

tipitiwitchet
Venus flytrap.

titanites
plural of titanite

tocolysis
The suppression of uterine contractions.

tomentodiplacones
plural of tomentodiplacone

tooth shells
plural of tooth shell

top shells
plural of top shell

top snail
A topshell (Trochidae spp. etc.)

topsnail
Alternative form of top snail.

torcula
winepress

torni
plural of tornus

tornus
The bottom corner of a wing.

tortilla
A type of Mexican flatbread made out of cornmeal or flour.
Spanish omelette; a type of omelette containing potatoes and onions.

tortillas
plural of tortilla

trabacula
Alternative form of trabecula (“small, dense piece of collagenous tissue”).

trabaculae
plural of trabacula

trabecula
A small supporting beam.
A small mineralized spicule that forms a network in spongy bone.
A fibrous strand of connective tissue that supports it in place.
Either of a pair of movable appendages on the head, in front of the antennae, of some mallophagous insects.
One of the fleshy columns, or columnae carneae, in the ventricle of the heart, to which the chordae tendineae are attached.
A projection from the cell wall across the cell cavity of the ducts of certain plants.

trabeculae
plural of trabecula

trabeculas
plural of trabecula

trabecule
Alternative form of trabecula.

trabecules
plural of trabecule

tragula
A type of javelin, used in ancient Sparta, attached to the thrower's wrist by a rope

tragulae
plural of tragula

tragulas
plural of tragula

trapezia
plural of trapezium

trapezium
A quadrilateral with two sides parallel.
A quadrilateral with two sides parallel.
A four-sided polygon with no parallel sides and no sides equal; a simple convex irregular quadrilateral.
The trapezium bone of the wrist.
A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers.

trapeziums
plural of trapezium

tricerion
A candlestick with three lights, signifying the trinity.

tricerions
plural of tricerion

trichites
plural of trichite

tridacna
Any member of the genus Tridacna of large saltwater clams with heavy fluted shells.

tridacnas
plural of tridacna

triforia
plural of triforium

trikerion
Alternative form of tricerion.