noun, plural habenulae [huh-ben-yuh-lee] . Anatomy.
a narrow bandlike structure, as the stalk attaching the pineal gland to the thalamus.

1875–80; < Latin: small strip of skin, equivalent to habēn(a) strap, thong, rein (derivative of habēre to have, hold, possess; cf. able, habit1) + -ula -ule

habenular, adjective
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Medical Dictionary

habenula ha·ben·u·la (hā-běn'yə-lə)
n. pl. ha·ben·u·lae (-lē')

  1. A frenulum.

  2. The stalk of the pineal gland. No longer in technical use.

  3. A circumscript cell mass embedded in the posterior end of the medullary stria of the thalamus, from which it receives most of its afferent fibers. Also called habena, pedunculus of pineal body.

ha·ben'u·lar adj.
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