Troyon

noun
1.
Constant
[kawn-stahn] /kɔ̃ˈstɑ̃/ (Show IPA), 1813–65, French painter.

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Troy-weight
noun 1. a system of weights in use for precious metals and gems (formerly also for bread, grain, etc.): 24 grains = 1 pennyweight (1.555 grams); 20 pennyweights = 1 ounce (31.103 grams); 12 ounces = 1 pound (0.373 kilogram). The grain, ounce, and pound are the same as in apothecaries’ weight, the grain alone […]
Trp
Military. 1. troop. Biochemistry. 1. tryptophan.
Trpsa
TRPSA transponder assembly