endoclinal
/ɛndəʊˈklɪnəl/Definitions
1. adjective
relating to or forming a curve that is concave to one side and convex to the other
“The endoclinal shape of the cave made it difficult to navigate.”
2. noun
a term used in paleontology to describe a fossilized organism that has been bent or curved by external forces
“The paleontologist studied the endoclinal remains of the ancient creature.”