I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: turtle (II) + back
: a raised convex surface: as
a. : an oval boss especially on furniture
b. : a raised obstruction sometimes illuminated and placed in the pavement at a street intersection for the guidance of traffic
c. : a convex deck at the bow or stern and sometimes extending from bow to stern of a boat so made to shed the seas quickly — called also turtle deck
d. : a roughly shaped artifact of stone chipped flat on one side and rounded on the other and prob. a blank form from which an implement might be chipped
e. : a rounded projection on the rear of a vehicle
II. adjective
or turtle-backed ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷
: having a back or upper surface shaped like the back of a turtle