PYRIFORM Meaning of PYRIFORM in English [ 'pɪrɪfɔ:m ](also piriform ) ■ adjective Anatomy & Biology pear-shaped.OriginC18: from mod. L. ~is , from pyrum (misspelling of pirum 'pear') + -iform . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004