- Zoology.
- a sedentary type of animal form characterized by a more or less fixed base, columnar body, and free end with mouth and tentacles, especially as applied to coelenterates.
- an individual zooid of a compound or colonial organism.
- a projecting growth from a mucous surface, as of the nose, being either a tumor or a hypertrophy of the mucous membrane.
- one of the two forms of individual that occur in coelenterates. It usually has a hollow cylindrical body with a ring of tentacles around the mouth
- a small vascularized growth arising from the surface of a mucous membrane, having a rounded base or a stalklike projection
