System Glossary
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Definition of Term

(English) Radial, a bony or cartilaginous support for a fin ray or spine. Usually three - the proximal, middle and distal radials. If the proximal radial is notably larger it is spoken of as a basal. Teleosts have only one row of radials between the fin rays and the supporting skeleton and these are called actinosts. (See also: actinost)

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