trolandA unit (symbol Td) of conventional retinal illuminance, intended as a means of correcting photometric measurements of luminance values impinging on the human eye by scaling them by the effective pupil size.
trolleyA trolley pole; a single-pole device for collecting electrical current from an overhead electrical line, normally for a tram/streetcar or a trolleybus.
trolleyologyAn area of philosophy dealing with the kind of moral dilemma typified by the trolley problem of whether to sacrifice one person to save others.
trollfaceAn ugly, unpleasant, or otherwise objectionable person.
trollfeedTo respond to (a troll) in an online community.
trollfeederA person who (frequently) feeds the troll.
TrololoEduard Khil's vocalized recording of the song "Я очень рад, ведь я, наконец, возвращаюсь домой (Ja očenʹ rad, vedʹ ja, nakonec, vozvraščajusʹ domoj)" and its accompanying music video, which has risen into a meme.
Trolox6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid, a water-soluble analog of vitamin E that acts as an antioxidant.
tromboncinoA kind of squash, that grows on a vine, has a shape reminiscent of a trombone, is eaten as a summer squash, and often exceeds two feet in length when mature as a winter squash.
tromboneA musical instrument in the brass family, having a cylindrical bore, and usually a sliding tube (but sometimes piston valves, and rarely both). Most often refers to the tenor trombone, which is the most common type of trombone and has a fundamental tone of B♭ˌ (contra B♭).
tromboonA 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.
trometamolThe organic compound tris when used in drugs.
trominoA polyomino consisting of three squares connected edge-to-edge.
trommelA revolving buddle or sieve for separating, or sizing, ores.
tromometerAn instrument for measuring slight earthquake shocks.
TrondheimA city and municipality in Trøndelag county (formerly Sør-Trøndelag), Norway. It is the third largest city in Norway after Oslo and Bergen.
trondhjemiteA leucocratic intrusive igneous rock, a variety of tonalite in which the plagioclase is mostly in the form of oligoclase.
trondhjemiticOf, pertaining to, or containing trondhjemite.
TrondraA small inhabited island in Shetland Islands council area, Scotland (OS grid ref HU3937).
troneA type of steelyard (weighing machine) for heavy wares, such as wool, consisting of two horizontal bars crossing each other, beaked at the extremities, and supported by a wooden pillar.
troodontidAny member of the family †Troodontidae of small, bird-like theropod dinosaurs with large brains, large eyes, and a retractable claw on the second toe of each hind foot, similar to a farmer's sickle, used for slashing at prey.
troonA transgender person, especially a trans woman.
troonbrainedExhibiting thoughts or characteristics stereotypically associated with transgender people.
tropaeolinAny of several orange dyes of very complex composition: tropaeolin O (acid orange 6, chrysoine resorcinol), tropaeolin OO (acid orange 5), or tropaeolin OOO (acid orange 7).
tropaionAn ancient Greek or Roman monument set up to commemorate a victory over foes, and typically shaped like a tree, sometimes with a pair of arm-like branches.