WordReference Random House Unabridged Dictionary of American English © 2020
troph•o•some  (trofə sōm′, trōfə-),USA pronunciation n. [Zool.]
  1. Anatomy, Zoologyan organ in deep-sea tube worms that is colonized by bacteria supplying the host worm with food and energy.
  2. Anatomy, Zoologya similar organ in other marine worms.
  • tropho- + -some3 1865–70

'trophosome' also found in these entries (note: many are not synonyms or translations):
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