turtleback

noun
tur·tle·back | \ˈtər-tᵊl-ˌbak \

Definition of turtleback 

: a raised convex surface

Other Words from turtleback

turtleback or turtle-backed \ˈtər-tᵊl-ˌbakt \ adjective

First Known Use of turtleback

1872, in the meaning defined above

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The first known use of turtleback was in 1872

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