Defn: A membranaceous or calcareous septum with which some mollusks close the aperture of the shell during the time of hibernation, or æstivation.

EPIPHYLLOSPERMOUS
Ep`i*phyl`lo*sper"mous, a. Etym: [Gr. (Bot.)

Defn: Bearing fruit on the back of the leaves, as ferns. Harris (1710).

EPIPHYLLOUS
Ep`i*phyl*lous, a. Etym: [Gr. (Bot.)

Defn: Growing upon, or inserted into, the leaf.

EPIPHYLLUM
Ep`i*phyl"lum, n. Etym: [NL.] (Bot.)

Defn: A genus of cactaceous plants having flattened, jointed stems, and petals united in a tube. The flowers are very showy, and several species are in cultivation.

EPIPHYSEAL; EPIPHYSIAL
Ep`i*phys"e*al, Ep`i*phys"i*al, (Anat.)

Defn: Pertaining to, or having the nature of, an epiphysis.

EPIPHYSIS E*piph"y*sis, n.; pl. Epiphyses. Etym: [NL., fr. Gr. (Anat.) (a) The end, or other superficial part, of a bone, which ossifies separately from the central portion, or diaphysis. (b) The cerebral epiphysis, or pineal gland. See Pineal gland, under Pineal.