noun, noun which may take the genitive case particle 'no'
spiny ray (of a fin)
Technical term in ichthyology; refers to the hard, unsegmented rays in fish fins, as opposed to soft rays (鰭条).
See also: 鰭条
棘条と軟条の数は魚種の同定に使われる。
The numbers of spiny rays and soft rays are used for fish species identification.