specula
plural of speculum

speculum
A medical instrument used during an examination to dilate an orifice.
A mirror, especially one used in a telescope.
A bright, lustrous patch of colour found on the wings of ducks and some other birds, usually situated on the distal portions of the secondary quills, and much more brilliant in the adult male than in the female.
A lookout place.

speculums
plural of speculum

sphinges
plural of sphinx

sphinx
A creature with the head of a person and the body of an animal, commonly a lion.
A person who keeps their thoughts and intentions secret; an enigmatic or impassive person.
A mandrill (Mandrillus sphinx), formerly classified as a baboon, and called sphinx baboon.
A sphinx moth.
A sphincter.

sphinx moths
plural of sphinx moth

sphinxes
plural of sphinx

sphynx
Dated form of sphinx (mythological creature).
Alternative letter-case form of Sphynx (breed of cat).

sphynxes
plural of sphynx

spica
A spike (kind of inflorescence in which sessile flowers are arranged on an unbranched elongated axis).
A spur.
A kind of bandage passing, by successive turns and crosses, from an extremity to the trunk; a spiral bandage with reversed turns.

spicae
plural of spica

spicas
plural of spica

spongy moth
Synonym of gypsy moth (Lymantria dispar)

spotless grass yellow
A species of pierid butterfly, Eurema laeta, inhabiting Asia and Australia.

sprawler
Someone or something which sprawls; agent noun of sprawl

sprawlers
plural of sprawler

staff sergeant
A non-commissioned officer in the armed forces of several countries, ranking above a sergeant (or, in the US Air Force, above a senior airman).
A nymphalid butterfly, Athyma selenophora, of tropical and subtropical Asia.

staphyle
The uvula of the soft palate.

staphyles
plural of staphyle

starry bob
A species of skipper butterfly, Iambrix stellifer, family Hesperiidae, of Southeast Asia, having dark underwings marked with a few star-like spots.

stigma
An indication of infamy or disgrace.
An indication of infamy or disgrace.
An indication of infamy or disgrace.
An indication of infamy or disgrace.
An indication of infamy or disgrace.
A scar or birthmark.
The sticky part of a flower that receives pollen during pollination.
A visible sign or characteristic of a disease.
Synonym of pterostigma.

stigmas
plural of stigma

stigmat
Anglicised form of stigma

stigmata
plural of stigma

stigmate
Synonym of stigma.

stigmats
plural of stigmat

stigme
Anglicised form of stigma
A dot used as a punctuation mark in historical Greek texts, especially at the top of the line, equivalent to a period or full stop.

stiria
An icicle-shaped concretion.

stomatodysodia
Bad breath; halitosis.

streak
An irregular line left from smearing or motion.
A continuous series of like events.
A continuous series of like events.
A consistent facet of somebody's personality.
The color of the powder of a mineral. So called, because a simple field test for a mineral is to streak it against unglazed white porcelain.
A moth of the family Geometridae, Chesias legatella.
A tendency or characteristic, but not a dominant or pervasive one.
A strake.
A rung or round of a ladder.
The act of streaking, or running naked through a public area.

streake
Obsolete spelling of streak.

streakes
plural of streake

streaks
plural of streak

streamer
A long, narrow flag, or piece of material used or seen as a decoration.
Strips of paper or other material used as confetti.
A newspaper headline that runs along the top of a page.
A data storage system, mainly used to produce backups, in which large quantities of data are transferred to a continuously moving tape; a tape drive.
Any mechanism for streaming data.
A subscription service that streams content to an audience.
A person who streams activities on their computer (especially video gaming) to a live online audience.
In fly fishing, a variety of wet fly designed to mimic a minnow.
One who searches for stream tin.
A stream or column of light shooting upward from the horizon, constituting one of the forms of the aurora borealis.
A pupil belonging to a particular stream (division by perceived ability).

streamers
plural of streamer

stub-tailed morpho
A butterfly, Morpho theseus

subchief
A lesser or secondary chief.

subchiefs
plural of subchief

subvolcanites
plural of subvolcanite

suggesta
plural of suggestum

sulphur pearl
a very large, but harmless, bacterium, Thiomargarita namibiensis, that grows as a string of white beads large enough to be visible to the naked eye in the coastal sediments of Namibia

sulphurs
plural of sulphur

superspectacle
A particularly grand and impressive spectacle.

superspectacles
plural of superspectacle

sura
Any of the 114 chapters of the Quran.

surah
Alternative spelling of sura (“chapter of Quran”).

surahs
plural of surah

suras
plural of sura

suspected
believed to be a cause or at fault.

suwar
plural of sura

suwars
plural of suwar

swallowtail
The forked tail of a swallow.
Anything, such as a burgee, of a similar forked shape.
A type of tailcoat with two long tapering tails.
Any of various butterflies of the family Papilionidae, many of which have a long extension to each hindwing.

swallowtails
plural of swallowtail

sweet oil
An oil with a pleasant taste, especially olive oil or rape oil.

swift moths
plural of swift moth

sybarites
plural of sybarite

syce
Alternative spelling of sais (“groom or chauffeur”).

syces
plural of syce. (Alternative spelling of saises.)

symblephara
plural of symblepharon

symmetron
A scalar field associated with dark matter

symmetrons
plural of symmetron

synaptai
plural of synapte

synapte
A litany in the Greek church.

synaptes
plural of synapte

synaxes
plural of synaxis

synaxis
A congregation.
A day following a Great Feast in the Eastern Orthodox and Eastern Catholic churches, on which a person related to the events is remembered. For example, the Synaxis of John the Baptist follows the Theophany (Baptism of Christ), the Synaxis of the Archangel Gabriel follows the Annunciation, and the Synaxis of the Theotokos follows Christmas Day.

synophthalmia
Fusion of the eyes, as in cyclopia.

synopsia
The form of synaesthesia where hearing sound induces the perception of color.

syntheta
plural of syntheton

tabaldi
Synonym of African baobab.

tabaldis
plural of tabaldi

tabbies
plural of tabby

tabby
A kind of waved silk, usually called watered silk, manufactured like taffeta, but thicker and stronger. The watering is given to it by calendering.
A concrete mixture of lime with shells, gravel, or stones, in equal proportions, with an equal proportion of water. When dry, this becomes as hard as rock.
A brindled cat.
A woman, irrespective of age, but often used for a young, attractive woman.
An old maid or gossip.

talis
Alternative form of tallit.

tango
A standard ballroom dance in 4/4 time; or a social dance, the Argentine tango.
A Spanish flamenco dance with different steps from the Argentine.
A piece of music suited to such a dance.
A dark orange colour shade; deep tangerine

tangoes
plural of tango

tangos
plural of tango

tanwalls
plural of tanwall

tapestry moth
Synonym of carpet moth.

taxodione
The oxidized rearrangement product of taxodone.

tebeldi
Synonym of African baobab.

tebeldis
plural of tebeldi

teenie
A sixteenth of a dollar, a unit in which stocks could formerly be traded.

teenies
plural of teenie

telea
plural of telos

teras
a grossly malformed fetus

terata
plural of teras

terra
Earth, soil, land, or ground as a physical surface.
The material world as opposed to the heavens.
A continent or large landmass, especially on another planet or moon; e.g. Arabia Terra or Aphrodite Terra.
A lunar highland or mountainous region with relatively high albedo; e.g. Terra Nivium.

terrae
plural of terra

terras
plural of terra

tessella
A small tessera.

tessellae
plural of tessella

tetrahydroxyanthradione
tetrahydroxyanthraquinone

tetrahydroxyanthradiones
plural of tetrahydroxyanthradione