Trōch'i-lūs, n.
n. [Fr. trochile, Lat. trochilus, Gr. τροχιλός, from τρέχειν, to run.]
Sense 1. (Ornith.) (a.) An aquatic bird, a swift runner, with long legs, which is said to get its meat out of the crocodile’s mouth. Sir T. Herbert. (b.) The golden-crowned wren. (c.) A genus of humming-birds, including numerous species, some of which are remarkable for their diminutive size and the brilliancy of their coloring.
Sense 2. (Arch.) An annular molding whose section is concave, like the edge of a pulley; —called also scotia. Gwilt.