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planarian
[ pluh-nair-ee-uhn ]
noun
, Zoology.
- any of various free-swimming, mostly freshwater flatworms of the class Turbellaria, having an undulating or sluglike motion: popular in laboratory studies for the ability to regenerate lost parts.
planarian
/ pləˈnɛərɪən /
noun
- any free-living turbellarian flatworm of the mostly aquatic suborder Tricladida, having a three-branched intestine
planarian
/ plə-nâr′ē-ən /
- Any of various small, chiefly freshwater flatworms of the class Turbellaria, having soft, broad, ciliated bodies shaped like a leaf. Planarians have a mouth on their lower side that is often closer to the tail than the head, and a three-branched digestive cavity. If a planarian is cut into several pieces, each piece can grow into a whole new organism.
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Word History and Origins
Origin of planarian1
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Word History and Origins
Origin of planarian1
C19: from New Latin Plānāria type genus, from Late Latin plānārius level, flat; see plane 1
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Example Sentences
Flat against the stone and not easily perceived may be a chiton, a planarian worm, or a nudibranch.
From Project Gutenberg
It is now nearly forty years since the presence of chlorophyl in certain species of planarian worms was recognized by Schultze.
From Project Gutenberg
Among the lowest forms of worms are the Planarian worms, already alluded to as examples of the third grade of animal existence.
From Project Gutenberg
These are planarian worms, and though not of prepossessing appearance generally, are extremely interesting animals to study.
From Project Gutenberg
The planarian worms that I have just been telling about are monsters.
From Project Gutenberg
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