I. -ükəl adjective
Etymology: in sense 1, from nucha + -al; in other senses, from (assumed) New Latin nuchalis, from New Latin nucha + Latin -alis -al
1. : of, relating to, or lying in the region of the nape
2. : situated on the back of the prothorax of an insect immediately behind the head
3. : of or relating to a nucha
II. noun
( -s )
: a nuchal element (as a scale or bone)