Definition of Nudibranchia in English:


plural noun

  • An order of shell-less marine molluscs which comprises the sea slugs.

    • ‘The order Pleurobranchoidea was located within Nudibranchia, rendering the latter paraphyletic (opisthobranch intrarelationships will be further analyzed elsewhere).’
    • ‘The phylogenies of some orders of opisthobranchs (Anaspidea and Nudibranchia) based on partial sequences of nuclear 18S rRNA and mitochondrial rrnS, rrnL, and cox1 genes were also published recently.’
    • ‘There have been behavioral or cellular level physiological studies of swimming in Aplysia, Clione and Limacina, Dendronotus, Hexabranchus, Melibe and Tritonia (Nudibranchia).’
    • ‘Of the four major sub-orders of Nudibranchia, at least two (Dentronotidae, and Doridae) include examples of swimming species.’
    • ‘However, it should be noted that as with Nudibranchia, there are members of Notaspidea that do not swim and others with different modes of swimming locomotion, such as parapodial waves (not shown).’


Modern Latin (plural), from Latin nudus ‘nude’ + branchia.