Bible Dictionaries
Turtleback

Webster's Dictionary

(1):

(n.) A rude stone celt of a form suggesting the back of a turtle.

(2):

(n.) A convex deck at the bow or stern of a vessel, so made to shed the seas quickly.

Bibliography Information
Webster, Noah. Entry for 'Turtleback'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/turtleback.html. 1828.