trentaine, n.f., about thirty, some thirty; age of thirty. Il a passé la —; he is over thirty.
trente, n.m. and adj., thirty, thirtieth.
trentenaire, adj., of thirty years’ duration.
trentième (-tièm), n.m.f. and adj., thirtieth.
tréou, n.m., (nav.) lug-sail.
trépan, n.m., (surg.) trepan (instrument); trepanning.
trépanation, n.f., (surg.) trepanning.
trépaner, v.a., (surg.) to trepan.
trépang, n.m., (zoöl.) trepang.