surfactant
A surface-active agent, or wetting agent, capable of reducing the surface tension of a liquid; typically organic compounds having a hydrophilic “head” and a hydrophobic “tail”.
A lipoprotein in the tissues of the lung that reduces surface tension and permits more efficient gas transport.

surfactants
plural of surfactant

surfboat
Alternative spelling of surf boat.

surfboatman
Synonym of surfman (“member of surf boat crew”).

surfboatmen
plural of surfboatman

surfboats
plural of surfboat

surfman
A member of a rescue team using a surf boat.
A person skilled in handling boats in surf.

surfmanship
The art or skill of operating a surf boat.

surfmen
plural of surfman

surgeonships
plural of surgeonship

surmark
A mark made on the moulds of a ship to show where the angles of the timbers are to be placed.

surmarks
plural of surmark

surrogateships
plural of surrogateship

surveyorships
plural of surveyorship

survivorships
plural of survivorship

sustah
Pronunciation spelling of sister.

sustahs
plural of sustah

suster
Pronunciation spelling of sister.

susters
plural of suster

sutlerships
plural of sutlership

suttles
plural of suttle

suzerainships
plural of suzerainship

suzerainties
plural of suzerainty

suzerainty
A relation between states in which a subservient nation has its own government, but is unable to take international action independent of the superior state.
A similar relationship between other entities.
The status or power of a suzerain.

suzereignty
Nonstandard spelling of suzerainty.

swaining
Lovemaking; courtship.

swanga
Alternative form of swanger.

swangas
plural of swanga

swanger
A decorative protruding construction on an automobile's rim, especially on a Houston, Texas, slab car.

swangers
plural of swanger

swanmark
A mark of ownership cut on the bill of a swan.

swanmarks
plural of swanmark

swanships
plural of swanship

swapbodies
plural of swapbody

swapbody
Alternative form of swap body.

swasticar
Alternative letter-case form of Swasticar.

swasticars
plural of swasticar

swastikar
Alternative form of Swasticar.

swastikars
plural of swastikar

swath
The track cut out by a scythe in mowing.
A broad sweep or expanse, such as of land or of people.

swaths
plural of swath

swayings
plural of swaying

sweepboat
A scow that is propelled only by water currents and by sweeps (two massive steering oars in front and back).

sweepboats
plural of sweepboat

swifter
comparative form of swift: more swift

swifters
plural of swifter

swingboats
plural of swingboat

swingtree
The bar of a carriage to which the traces are fastened.

swingtrees
plural of swingtree

swipecard
A plastic card (keycard, bank card, membership card etc.) with a magnetic stripe containing coded data, that is swiped through a reader.

swipecards
plural of swipecard

switchyard
Part of a railway with an arrangement of switches (or points) allowing trains to be diverted and reassembled.
Synonym of substation.

switchyards
plural of switchyard

swolemate
A fitness partner, especially those who are in a relationship with each other.

swolemates
plural of swolemate

sylvanshine
An optical phenomenon in which dew-covered waxy-leaved trees retroreflect beams of light, as from a vehicle's headlights.

sylviculture
Alternative spelling of silviculture.

sylvicultures
plural of sylviculture

symbiome
A biome of the symbiotic relationships between species

symbiomes
plural of symbiome

symbiont
An organism that lives in a symbiotic relationship.

symbionts
plural of symbiont

symbiostasis
homeostasis in a symbiotic relationship

symbiote
Synonym of symbiont.

symbiotroph
An organism that derives nourishment through a symbiotic relationship with another organism.

symbiotrophs
plural of symbiotroph

symbiovar
symbiotic variant

symbiovars
plural of symbiovar

symport
The transportation, through a membrane, of molecules of more than one substance at the same time.

symporter
An integral membrane protein involved in the movement of different molecules or ions in the same direction across a phospholipid membrane.

symporters
plural of symporter

symports
plural of symport

synangia
plural of synangium

synangium
The divided part beyond the pylangium in the aortic trunk of the amphibian heart.
The boat-shaped sorus of certain ferns.

syndicships
plural of syndicship

synopses
plural of synopsis

synopsis
A brief summary of the major points of a written work, either as prose or as a table; an abridgment or condensation of a work.
A reference work containing brief articles that taken together give an overview of an entire field.
A prayer book for use by the laity of the church.

syntaxis
Syntax.
A convergence of mountain ranges, or geological folds, towards a single point.
Syntaxy.

syntrophies
plural of syntrophy

syntrophy
The relationship between the individuals of different species (especially of bacteria) in which one or both benefit nutritionally from the presence of the other

syrang
Archaic form of serang.

syrangs
plural of syrang

ta
Thanks.
give (imperative)

taaghoot
Alternative form of taghut.

taas
plural of taa

tablegrape
Alternative form of table grape.

tablegrapes
plural of tablegrape

tablings
plural of tabling

tachanka
A horse-drawn machine gun, usually a cart or open wagon with the gun installed in the back.

tachankas
plural of tachanka

tackie
A canvas shoe with a rubber sole.
Another word for trainers or runners.
The tyre of a car or other vehicle.

tackies
plural of tackie
plural of tacky

tacklehouse
A building located at a port, and the corresponding business operated by one of the major shipping companies, that employs porters to load and unload goods from ships.

tacklehouses
plural of tacklehouse

tacklings
plural of tackling

taffarel
Obsolete form of taffrail.

taffarels
plural of taffarel

tafferel
A carved panel.
The flat upper part of a ship's stern above the transom, often decorated with carvings.
The taffrail.

tafferels
plural of tafferel

tafferer
A taffrail.

tafferers
plural of tafferer

taffrail
The curved wooden top of the stern of a sailing man-of-war or East Indiaman, usually carved or decorated.
The rail around the stern of a ship.
The deck area at the stern of a vessel.

taffrails
plural of taffrail

taghoot
Alternative form of taghut.

taghut
idolatry; the worship of anything except Allah

tailback
A line of motor vehicles causing or the result of traffic congestion or a traffic jam.
A running back or halfback who lines up furthest to the rear in an I formation.

tailbacks
plural of tailback

tailboard
A hinged board or hatch at the rear of a vehicle that can be lowered for loading and unloading; a tailgate.

tailboards
plural of tailboard

taildragger
An aircraft with a wheel behind the main landing gear, underneath the tail.

taildraggers
plural of taildragger

tailfin
A fin at the tail of a fish, caudal fin
A fin on the tail of an aircraft, vertical stabilizer
A fin-like projection at the rear of a car, common on American cars of the 1950s.

tailfins
plural of tailfin

tailgate
A hinged board or hatch at the rear of a vehicle that can be lowered for loading and unloading.
The hinged rear door of a hatchback.
The downstream gate in the lock on a canal or river, or in an irrigation system.
Ellipsis of tailgate party.
A tunnel for drawing spent air away from the working face of a mine.

tailgates
plural of tailgate

taillamp
A taillight.

taillight
One of a pair of red lights mounted on the rear of a vehicle, so it can be seen from the rear at night.

taillights
plural of taillight

tailorships
plural of tailorship

tailpipe
An exhaust pipe exhausting to the aft of the vehicle.
An exhaust pipe (on a vehicle) (in any configuration).

tailpipes
plural of tailpipe

tailplane
A horizontal airfoil, at the rear of an aircraft, to which the elevator is attached; usually associated with the tailfin.

tailplanes
plural of tailplane