a. (鱼鳞)板状的, 盾鳞状的

n. 有盾鳞的鱼

[ adj ]
as the hard flattened scales of e.g. sharks
<adj.all>

Placoid \Plac"oid\, a. [Gr. pla`x, plako`s, a tablet + -oid.]
(Zo["o]l.)
Platelike; having irregular, platelike, bony scales, often
bearing spines; pertaining to the placoids.


Placoid \Plac"oid\, n. (Zo["o]l.)
(a) Any fish having placoid scales, as the sharks.
(b) One of the Placoides.