Word Study
Trocar
CIDE DICTIONARY
Trocar, n. [F. trocart (or trois-quarts, i. e., three quarters); trois three (L. tres) + carre the side of a sword blade; -- so called from its triangular point.].
A stylet, usually with a triangular point, used for exploring tissues or for inserting drainage tubes, as in dropsy. [1913 Webster]
OXFORD DICTIONARY
Trocar, n. an instrument used for withdrawing fluid from a body cavity, esp. in oedema etc.
Etymology
F trois-quarts, trocart f. trois three + carre side, face of an instrument, after its triangular form
ROGET THESAURUS
Trocar
Perforator
N perforator, piercer, borer, auger, chisel, gimlet, stylet, drill, wimble, awl, bradawl, scoop, terrier, corkscrew, dibble, trocar, trepan, probe, bodkin, needle, stiletto, rimer, warder, lancet, punch, puncheon, spikebit, gouge, spear, puncher, punching machine, punching press, punch pliers.For further exploring for "Trocar" in Webster Dictionary Online