• (n.) The space between two dentils. • (n.) The space between two triglyphs.
Met'o·che noun [ New Latin , from Greek ... a sharing, from ... to share in; ... with + ... to have.] (Architecture) (a) The space between two dentils. (b) The space between two triglyphs. 
In architecture a metoche is the space between two dentils, or the space between two triglyphs.