Situated in front of the optic chiasma; specifically of or designating the region of the brain consisting of the anterior part of the hypothalamus and third ventricle.
Origin
Late 19th century (in an earlier sense). From pre- + optic.
Definition of preoptic in US English:
preoptic
adjectiveˌpriːˈɒptɪk
Anatomy
Situated in front of the optic chiasma; specifically of or designating the region of the brain consisting of the anterior part of the hypothalamus and third ventricle.
Origin
Late 19th century (in an earlier sense). From pre- + optic.