POLLEX Meaning of POLLEX in English [ 'pɒlɛks ]■ noun ( plural pollices -lɪsi:z ) Anatomy & Zoology the innermost digit of a forelimb, especially the thumb in primates.OriginC19: from L., lit. 'thumb or big toe'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004