PLACOID
Meaning of PLACOID in English
/plak"oyd/ , adj.
platelike, as the scales or dermal investments of sharks.
[ 1835-45; plak- (s. of pláx ) something flat, tablet + -OID ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012