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see MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
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(invertebrate zoology)
Any member of the Mollusca.


(US), mollusk
any invertebrate of the phylum Mollusca, having a soft unsegmented body and often a shell, secreted by a fold of skin (the mantle). The group includes the gastropods (snails, slugs, etc.), bivalves (clams, mussels, etc.), and cephalopods (cuttlefish, octopuses, etc.)
References in periodicals archive ?
In one experiment, the scientists watched flatworms kill at least 30 different species of mollusks, including ones with protective trap doors.
Encourage your students to find out as much as they can about their favorite mollusk and then use what they have learned to write a creative story.
Getting the word out to a diverse array of citizens about freshwater mollusk and riverine habitat conservation initiatives has always been a challenge.
Mollusks are invertebrates, or animals without a backbone, that have a soft, unsegmented body.
A newly discovered saltwater flatworm, pale yellow and about the size of a silver dollar, can take down mollusks in their shells, thanks to a powerful neurotoxin also found in puffer fish.
Barely visible as pink specks just 18 months ago, these sea mollusks now are an inch long and there are 18,000 of them at the captive breeding program.
An average adult mollusk measures eight inches and weighs about three pounds.
Most mollusks have such tissue, but in this armored species, the gland is about 100 times the size of that found in related species.
One such gene is active in the neural and reproductive tissues of the mollusk, they report in the Sept.
I feel compelled to respond to "At a Snail's Place: Rock climbing cuts mollusk diversity" (SN: 4/12/03, p.
3) Dean Ween, left, and Gene Ween haven't shown much growth with ``The Mollusk.
The shells, she said, are made bit by bit by the mollusk.