American Heritage Dictionary
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Century Dictionary
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GNU Webster's 1913
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WordNet
Elsewhere on the web
Of particular interest was a swimming snail which 'spins' a mucus net to catch food, a carnivorous pteropod which feeds exclusively on its 'relatives, and a crustacean known as an— Practical Fishkeeping news (RSS)
Rich stores of minerals have been accumulating on the floor of the continental shelf - some freighted down the rivers from the lands; some derived from sea creatures that have died and whose remains have drifted down to the bottom; some from the shells that once encase a diatom, the streaming protoplasm of a radiolarian, or the transparent tissues of a pteropod.— Migrations
Were they conceived from the contemplation of the carcasses of the ichthyosaurus and pteropod, and did the terror of men hear the sound of their feet in the tall grass and the wind howl when their voices filled the caves?— Over Strand and Field
The pteropod isn't the only organism that will be affected by the increasing acidity of the ocean, though.— Grist - the Latest from Grist
Other sensitive areas are the Southern Ocean and the subpolar North Pacific, where acidification threatens to unravel important food chains by making life difficult for a small marine snail called a pteropod.— Signs of the Times

American Heritage Dictionary (1)
Century Dictionary (1)
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