D defs.my
Entry 2 senses Webster, 1913

Trochilus

· Troch·i·lus · IPA /ˈtɹɒkɪləs/
01 n. A genus of humming birds. It Formerly included all the known species.
pl. Trochili ((#))
  1. 1.
    A genus of humming birds. It Formerly included all the known species.(Zool.) [Obs.]
  2. 2.
    An annular molding whose section is concave, like the edge of a pulley; -- called also scotia.(Arch.) Also: scotia