Definition of columellae:
(n) :
(anatomy) The skin at the end of the septum which separates the nostrils.
(n) :
(comparative anatomy) In birds, reptiles, and amphibians, the small bone which carries vibration from the tympanum to the inner ear.
(n) :
(biology) Any of various small structures in plants or animals that are columnar in shape.
(n) :
(malacology) In gastropods, the structure that extends down the middle of the whorls of the shell.
(n) :
(coral science) The structure at the center of the calyx where the septa join together.
(n) :
(mycology) The central sterile portion of the sporangium in various fungi.