The Collaborative International Dictionary
Ichthyocolla
Ichthyocol \Ich"thy*o*col\, Ichthyocolla \Ich`thy*o*col"la\, n. [L. ichthyocolla, Gr. ?; 'ichqy`s, -y`os, a fish + ? glue: cf. F. ichthyocolle.] Fish glue; isinglass; a glue prepared from the sounds of certain fishes.
Wiktionary
ichthyocolla
n. (context archaic English) fish glue; isinglass; a glue prepared from the sounds (swimming bladders) of various fishes.