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Definition of piniform in English:

piniform

Pronunciation /ˈpʌɪnɪfɔːm/

adjective

rare Anatomy

  • Having the shape of a pine cone; especially in "piniform decussation" noun the superior pyramidal decussation, a roughly conical area of the anterior medulla oblongata between the olivary nuclei.

Origin

Late 19th century; earliest use found in John S. Billings (1838–1913). From classical Latin pīnus pine + -iform, perhaps after scientific Latin piniformis.