VITELLUS Meaning of VITELLUS in English [ vɪ'tɛləs , vʌɪ- ]■ noun ( plural vitelli -lʌɪ ) Embryology the yolk of an egg or ovum.OriginC18: from L., lit. 'yolk'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004