The"ca (?), n.; pl. Thecae (#). [L., fr. Gr. a case to put anything in. See Tick a cover.]

1.

A sheath; a case; as, the theca, or cell, of an anther; the theca, or spore case, of a fungus; the theca of the spinal cord.

2. Zool. (a)

The chitinous cup which protects the hydranths of certain hydroids.

(b)

The more or less cuplike calicle of a coral.

(c)

The wall forming a calicle of a coral.

 

© Webster 1913.

Log in or registerto write something here or to contact authors.