What is "calceiform"

Calceiform \Cal"ce*i*form`\ (k[a^]l"s[-e]*[i^]*f[^o]rm`), a. [L. calceus shoe + -form.] (Bot.) Shaped like a slipper, as one petal of the lady's-slipper; calceolate. [1913 Webster] ||

a. Having the shape of a slipper or shoe

adj. slipper-shaped; "the calceiform lip of certain orchids" [syn: calceolate]