ˈdȯrsəm, -ȯ(ə)s- noun
( plural dor·sa -sə)
Etymology: Latin
1. : back ; especially : the entire dorsal surface of an animal or the upper surface of an appendage or part (as of the nose, tongue, or foot)
the dorsum of a segment
2.
[New Latin, from Latin]
: the upper side of the tongue behind the tip ; specifically : the part opposite the velum when the tongue is at rest