NUDIBRANCH Meaning of NUDIBRANCH in English [ 'nju:dɪbraŋk ]■ noun Zoology a shell-less marine mollusc of the order Nudibranchia; a sea slug.Originfrom mod. L. Nudibranchia , from L. nudus 'nude' + branchia . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004