The Collaborative International Dictionary
Cyma reversa
Cyma \Cy"ma\ (s[imac]"m[.a]) n. [NL., fr. Gr. ky^ma See Cyme]
(Arch.) A member or molding of the cornice, the profile of which is wavelike in form.
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(Bot.) A cyme. See Cyme.
Cyma recta, or Cyma, a cyma, hollow in its upper part and swelling below.
Cyma reversa, or Cyma Ogee, a cyma swelling out on the upper part and hollow below.
Wiktionary
cyma reversa
n. (context architecture English) A (l en cyma) ((l en moulding)) (l en convex) in its (l en upper) part, and (l en concave) in its (l en lower) part.