A giant salamander (genus Cryptobranchus) of North America that inhabits large, swiftly flowing streams with rocky bottoms. / A reckless, headstrong person.

(medicine) The formation of (excess) fibrous connective tissue in an organ.

(organic chemistry) The diterpenoid (4aS,5R,6R,6aR,7S,11aS,11bR)-5,6-dihydroxy-4,4,11b-trimethyl-1,2,3,4a,5,6,6a,7,11,11a-decahydronaphtho[2,1-f][1]benzofuran-7-carboxylic acid in the seeds of Pter...

In a manner that is lively or high-spirited