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.
(pl. columellae, adj. columellate) ( Iversen and Troels-Smith, 1950) A rod-like element of the sexine/ ectexine, either supporting a tectum or a caput. Comment: The difference between a baculum and a columella in current usage is, that a baculum is always a free standing element of sculpturing, whereas a columella is part of the structure. See also: baculum, pilum. Columellae layer ( Reitsma, 1970) Synonym of infratectum. See also: interstitium.