keel
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 23:40, 13 September 2013 by Andreas Plank (Talk | contribs) (1 revision: import_noun-simple)
keel (noun; Anglo-Saxon ceol, ship): 1. A prominent ridge or carina.
2. (Bryozoa) a. In Stenolaemata, a flat median portion of the zooidal wall between sinuses in recumbent part of endozone or as a synonym of carina. b. In Phylactolaemata, a median longitudinal ridge along recumbent tubular colony parts.
3. (Mollusca: Gastropoda) A spiral ridge usually marking a change of slope in the outline of the shell.
