n.
Pronunciation: ' kä-l ə -j ə n
Function: noun
Etymology: Greek kolla + International Scientific Vocabulary -gen
Date: circa 1865
: any of a group of fibrous proteins that occur in vertebrates as the chief constituent of connective tissue fibrils and in bones and yield gelatin and glue upon boiling with water
– col · lag · e · nous \ k ə - ' la-j ə -n ə s \ adjective