holobranch

noun
hol·​o·​branch | \ ˈhäləˌbraŋk, ˈhōl-\
plural -s

Definition of holobranch

: a fish gill in which the branchial arch has two rows of lamellae or filaments — compare hemibranch sense 2

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History and Etymology for holobranch

International Scientific Vocabulary hol- + -branch

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