The Collaborative International Dictionary of English v.0.48:
Metope \Met"o*pe\, n. [NL., fr. Gr. ?; meta` with, between + ?
opening, hole, the hole in the frieze between the beam ends.]
1. (Arch.) The space between two triglyphs of the Doric
frieze, which, among the ancients, was often adorned with
carved work. See Illust. of Entablature.
2. (Zool.) The face of a crab.
Note: In the Parthenon, groups of centaurs and heroes in high
relief occupy the metopes.