infundibulum

UK: /ˌɪnfʌnˈdɪbjʊləm/ US: (in′fun dib′yə ləm)

WordReference Random House Unabridged Dictionary of American English © 2025

in•fun•dib•u•lum  (in′fun dib′yə ləm), n., pl. -la (-lə). [Anat.]

1. Anatomy a funnel-shaped organ or part.
2. Anatomy a funnel-shaped extension of the hypothalamus connecting the pituitary gland to the base of the brain.
3. Anatomy a space in the right ventricle at the base of the pulmonary artery.

• Neo-Latin, Latin: funnel, equivalent. to infundi- (stem of infundere to pour into; see in-², found³) + -bulum instrumental suffix; compare infuse
• 1700–10;

in′fun•dib′u•lar, in•fun•dib•u•late  (in′fun dib′yə lāt′), adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

infundibulum / ˌɪnfʌnˈdɪbjʊləm/ noun ( -la / -lə/)

1. any funnel-shaped part, esp the stalk connecting the pituitary gland to the base of the brain

Etymology: 18th Century: from Latin: funnel, from infundere to infuse

ˌinfunˈdibulate adjective