WebBritannica Dictionary definition of MOLLUSK. [count] biology. : any one of a large group of animals (such as snails and clams) that have a soft body without a backbone and that usually live in a shell. WebJan 25, 2024 · Definition of Phylum Mollusca . The members of the Phylum Mollusca are soft-bodied animals, unsegmented with a distinct head, muscular foot, and visceral lump. The study of Mollusca is known as Malacology. Molluscs are mostly seen in Marine and freshwater. They mostly possess organ system level of organisation.
Mollusk Definition & Meaning - Merriam-Webster
Webmollusc ( ˈmɒləsk) or mollusk n (Animals) any invertebrate of the phylum Mollusca, having a soft unsegmented body and often a shell, secreted by a fold of skin (the mantle). The … WebMollusca noun plural Mol· lus· ca mə-ˈləs-kə : a large phylum of invertebrate animals (as snails, clams, and mussels) that have a soft unsegmented body lacking segmented … 7點量表
Phylum Mollusca manoa.hawaii.edu/ExploringOurFluidEarth
WebFeb 9, 2024 · Updated on February 09, 2024. The radula is a special structure used by many mollusks to scrape food off rocks, to feed off of plants or create depressions in rocks that the mollusk uses for habitat. The radula has many rows of tiny teeth that are replaced as they wear down. Each row of teeth consists of marginal teeth, one or more lateral ... WebPearl definition, a smooth, rounded bead formed within the shells of certain mollusks and composed of the mineral aragonite or calcite in a matrix, deposited in concentric layers as a protective coating around an irritating foreign object: valued as a gem when lustrous and finely colored. See more. WebMollusc means soft. These organisms are found in the terrestrial as well as in deep seas. Their size ranges from microscopic organisms to organisms 20 metres long. They play a very important role in the lives of humans. … 7點總裁