triathlon
An athletics event in which contestants compete in swimming, cycling and running in turn.
A former Olympic athletics event in which contestants compete in long jump, shot put, and 100-yard dash.
Generally, a sports event in which contestant compete in a combination of three sports.

triathlons
plural of triathlon

trichording
Moving in three directions, about three axes.

triode
A thermionic valve containing an anode, a cathode, and a control grid; small changes to the charge on the grid control the flow from cathode to anode, which makes amplification possible.

triodes
plural of triode

triplestore
A database designed for the storage and retrieval of RDF (Resource Description Framework) metadata in the form of triples representing predicates.

triplestores
plural of triplestore

tripline
A concealed wire or string that sets off an alarm or activates a trap when tripped.

triplines
plural of tripline

trippet
A cam, wiper, or projecting piece which strikes another piece repeatedly.

trippets
plural of trippet

trishaw
A three-wheeled cycle rickshaw.

trishaws
plural of trishaw

trisikad
A pedicab.

trisikads
plural of trisikad

trochite
A wheel-like joint of the stem of a fossil crinoid.

trochites
plural of trochite

trochlea
A structure resembling or acting like a pulley.
A structure resembling or acting like a pulley.

trochleae
plural of trochlea

trochleas
plural of trochlea

trogue
A wooden trough forming a drain.

trogues
plural of trogue

troika
A Russian carriage drawn by a team of three horses abreast.
A party or group of three, especially a ruling council of three people in Soviet or Russian contexts.

troikas
plural of troika

troiki
plural of troika

tromboon
A trombone with the reed and bocal of a bassoon placed instead of the usual mouthpiece, which combines the limitations of both instruments, producing a loud comical sound.
An awkward union of disparate elements combining the disadvantages of both.

tromboons
plural of tromboon

trommel
A revolving buddle or sieve for separating, or sizing, ores.
A rotating drum for sorting items, such as waste for recycling.

trommels
plural of trommel

troptometer
A twist-measuring instrument used in torsion testing of materials.

troptometers
plural of troptometer

trowelful
as much as a trowel will hold

trowelfuls
plural of trowelful

trowelsful
plural of trowelful

truckbed
The bed (load-supporting platform) of a truck.

truckbeds
plural of truckbed

trunnel
Alternative form of treenail.
Alternative form of trundle.

trunnels
plural of trunnel

trypograph
An early machine for printing by the use of paper stencils.

trypographs
plural of trypograph

tsambouna
Alternative form of tsampouna.

tsambounas
plural of tsambouna

tsampouna
A bagpipe of the Greek islands; a folk instrument without a drone but with two chanters.

tsampounas
plural of tsampouna

tubeful
Enough to fill a tube.

tubefuls
plural of tubeful

tubelessness
Absence of a tube or tubes.

tubelet
A small, subsidiary tube

tubelets
plural of tubelet

tubeplate
A plate across the barrel of a boiler, containing many small holes to receive the firetubes.

tubeplates
plural of tubeplate

tubesful
plural of tubeful

tubivalve
A shell or tube formed by an annelid, such as a serpula.

tubivalves
plural of tubivalve

tubography
imaging via a tube

tuboimpedance
An impedance in a Eustachian tube

tuboimpedances
plural of tuboimpedance

tuboscopies
plural of tuboscopy

tuboscopy
endoscopy of a tube; usually
endoscopy of a tube; usually:

tubotympanum
The auditory tube and tympanic cavity considered as a single entity

tubulars
Bicycle tires with the inner tube permanently stitched inside the casing.

tubule
A small pipe or fistular body; a little tube.

tubules
plural of tubule

tubulet
A tubule.

tubulets
plural of tubulet

tubulocyst
A cyst formed by the blockage of a tubule.

tubulocysts
plural of tubulocyst

tubulure
A short tubular opening at the top of a retort, or at the top or side of a bottle; a tubulation.

tubulures
plural of tubulure

tubus
A tube.

tufa
Calcareous lime deposited by precipitation from a body of water, such as a hot spring.
A variety of volcanic rock, tuff.

tufas
plural of tufa

tuftsin
A tetrapeptide produced by enzymatic cleavage of the Fc-domain of the heavy chain of immunoglobulin G.

tuftsins
plural of tuftsin

tuluma
A wooden box used by Tokelauan fishermen.

tumblification
A tumbling or tossing, as of a ship in a storm.

tumi
A ceremonial axe used by some Incan and pre-Incan cultures of South America.

tumis
plural of tumi

tunful
Enough to fill a tun or cask.

tunfuls
plural of tunful

tunnelball
A children's game in which players stand in line with their feet apart, making a tunnel with their legs, down which the lead player propels a ball back to the last player, who runs with it to the front of the line and repeats; played competitively between teams for speed, or by a single team for recreation or exercise.

tunsful
plural of tunful

turbinotome
A surgical instrument for performing turbinotomy.

turbinotomes
plural of turbinotome.

turbodrill
A drill used in oil wells etc in which the bit is rotated by a turbine motor within the well.

turbodrills
plural of turbodrill

turbomachine
Any machine that transfers energy between a rotor and a fluid, including both turbines and compressors.

turbomachines
plural of turbomachine

turborocket
A jet engine where the turbine that turns the inlet compressor is powered by a rocket engine.

turborockets
plural of turborocket

turion
A bud, produced by some aquatic plants, that becomes detached and dormant until the following spring

turiones
plural of turio
plural of turion

turions
plural of turion

turmite
A two-dimensional variant of a Turing machine in which the head has an orientation in addition to a position and state.

turmites
plural of turmite

turnagain
The movement of the bobbin in producing the breadth, or series of narrow stripes, in one sheet, with distinct selvage on each strip.

turnagains
plural of turnagain

turnplough
A type of plough that is designed to turn over the soil, often by the use of a mouldboard.

turnploughs
plural of turnplough

turnwrest
A cumbersome kind of plough formerly used in England, especially in Kent.

turnwrests
plural of turnwrest

tuyer
Alternative form of tuyere (part of a blast furnace)

tuyere
A nozzle or similar fixture through which the blast is delivered to the interior of a blast furnace, or to the fire of a forge

tuyeres
plural of tuyere

tuyers
plural of tuyer

tweese
A surgeon's case of instruments.

tweeses
plural of tweese

twier
Alternative spelling of tuyere.

twiers
plural of twier

twiffler
A plate intermediate in size between a dinner plate and a side plate, about 9½ inches in diameter.

twifflers
plural of twiffler

twincam
A type of sports car engine that has two overhead camshafts within the cylinder head, resulting in more horsepower than a standard single cam engine.

twincams
plural of twincam

twyer
Alternative spelling of tuyere.

twyere
Alternative spelling of tuyere.

twyeres
plural of twyere

twyers
plural of twyer

twystron
A microwave-producing vacuum tube that combines the principles of a traveling wave tube and a klystron.

tymp
A hollow water-cooled iron casting in the upper part of the archway of a blast furnace in which the dam stands.

tymps
plural of tymp

ugal
A bronze metallophone used in the classical gamelan music of Indonesia.

ugals
plural of ugal

uhadi
A musical bow of the Xhosa people.

ukambin
An arrow-poison, extracted from plants of the family Apocynaceae, used by some African peoples; its action is similar to that of digitalis.

ultraplankton
nanoplankton and picoplankton considered as a group

ultrasuperovulation
An extreme level of ovulation

ultratherm
A shortwave diathermy machine.

ultratherms
plural of ultratherm

umbilicoplasties
plural of umbilicoplasty

umbilicoplasty
A plastic surgery procedure to modify the appearance of the navel.