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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 mollusca
 軟體動物類

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 Mol·lus·ca /məˈləskə/ 名詞 複數

From: Webster's Revised Unabridged Dictionary (1913)

 Mol·lus·ca prop. n. pl.  Zool. One of the grand divisions of the animal kingdom, a phylum including the classes Cephalopoda, Gastropoda, Pteropoda, Scaphopoda, and Pelecyopoda (syn. Bivalvia, formerly called Lamellibranchiata, or Conchifera).  These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally.  Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity.  They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or multivalve.
 Note:Formerly the Brachiopoda, Bryzoa, and Tunicata were united with the Lamellibranchiata in an artificial group called Acephala, which was also included under Mollusca. See Molluscoidea.
 

From: WordNet (r) 2.0

 Mollusca
      n : gastropods; bivalves; cephalopods; chitons [syn: phylum
          Mollusca]