ctenoid

/tee-noid, ten-oid/US // ˈti nɔɪd, ˈtɛn ɔɪd //UK // (ˈtiːnɔɪd, ˈtɛn-) //

栉风沐雨,栉风沐雨的人,栉风沐雨的,栉风沐雨的日子

Definitions

adj.形容词 adjective

1
Zoology.
- : comblike or pectinate; rough-edged.
- : having rough-edged scales.

The cycloid and ctenoid scales of Teleosteans (see p. 105) are thin plates coated with epidermis.
The exoskeleton is sometimes absent but generally consists of overlapping cycloid or ctenoid scales.
A ctenoid scale differs in having its posterior margin pectinate.
Louis Agassiz distinguished four kinds of scales—placoid, ganoid, cycloid and ctenoid.
There are two principal types of Teleostean scales, the cycloid and ctenoid.