Columella

Col`u*mel"la

(?), n. [L., dim. of columen column. See Column.] 1. (Bot.) (a) An axis to which a carpel of a compound pistil may be attached, as in the case of the geranium; or which is left when a pod opens. (b)A columnlike axis in the capsules of mosses.
[1913 Webster]

2. (Anat.) A term applied to various columnlike parts; as, the columella, or epipterygoid bone, in the skull of many lizards; the columella of the ear, the bony or cartilaginous rod connecting the tympanic membrane with the internal ear.
[1913 Webster]

3. (Zol.) (a) The upright pillar in the axis of most univalve shells. (b) The central pillar or axis of the calicles of certain corals.
[1913 Webster]

 

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Tue 11th December 2018