Also found in: Dictionary, Encyclopedia, Wikipedia.
Related to habenular trigone: habenular commissure, Habenular nucleus
a small triangular area on the posteromedial surface of the thalamus at the caudal end of the medullary stria, corresponding to the underlying habenula.
A depressed triangular area located on the lateral aspect of the posterior portion of the third ventricle. It contains a medial and lateral habenular nucleus.
See also: trigone