Definify.com
Webster 1913 Edition
Actinost
Ac′tin-ost
,Noun.
[Gr. [GREEK], [GREEK], ray + [GREEK] bone.]
(Anat.)
One of the bones at the base of a paired fin of a fish.
Definition 2024
actinost
actinost
English
Noun
actinost (plural actinosts)
- (ichthyology) A bone at the base of a paired fin (of a fish)
- 1889, Dr. G. Baur, Journal of morphology, Volume 3, On the morphology of ribs and the fate of the actinosts of the median fin in fishes:
- The second well-developed actinost is below the vertebra supporting the subcaudal blood-vessels, but that is not so strong proximally as the first; the ribs are not directed downwards, but backwards, and are entirely separated from each other.
- 1889, Dr. G. Baur, Journal of morphology, Volume 3, On the morphology of ribs and the fate of the actinosts of the median fin in fishes: