||Troch"i*lus (?), n.; pl.
Trochili (#). [L. trochilus a kind of small bird.
Gr. ?, fr. ? to run.] 1. (Zoöl.)
(a) A genus of humming birds. It Formerly included all
the known species. (b) Any one of several
species of wrens and kinglets. [Obs.] (c) The
crocodile bird.
2. (Arch.) An annular molding whose section
is concave, like the edge of a pulley; -- called also
scotia.