(In certain rhombiferan echinoderms) a complex type of pore rhomb with comb-like parallel slits and a raised external rim; compare earlier "pectinated rhomb".
Origin
Late 19th century.
Definition of pectinirhomb in US English:
pectinirhomb
noun
(In certain rhombiferan echinoderms) a complex type of pore rhomb with comb-like parallel slits and a raised external rim; compare earlier "pectinated rhomb".