Believed to increase the flexibility of red blood cells so they can flow through the blood vessels to the legs and feet

• Series of 30 requiems, to Roman Catholics
• A drug (trade name Trental) used to treat claudication

Wiktionary Word definitions in Wiktionary
n. 1 A Roman Catholic office and mass for the dead on the thirtieth day after death or burial. 2 (context by extension English) A dirge or elegy.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Trental \Tren"tal\, n. [LL. trentale, fr. L. triginta thirty; akin to tres three: cf. OF. trentel. See Three , and cf. Trigintal .] (R. C. Ch.) An office and mass for the dead on the thirtieth day after death or burial. ``Their trentals and their shrifts.'' ...