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trophosome

[trof-uh-sohm, troh-fuh-] /ˈtrɒf əˌsoʊm, ˈtroʊ fə-/
noun, Zoology
1.
an organ in deep-sea tube worms that is colonized by bacteria supplying the host worm with food and energy.
2.
a similar organ in other marine worms.
Origin
1865-1870
1865-70; tropho- + -some3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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