: of, relating to, or supplying the gills or associated structures or their embryonic precursors
Word History
Etymology
borrowed from New Latin branchiālis, from Latin branchia "gills" (borrowed from Greek bránchia, of uncertain origin) + -ālis -al entry 1
Note: Greek bránchia is conventionally taken to be from the base of bránchos "hoarseness, sore throat" (as by Frisk, Griechisches Etymologisches Wörterbuch), though the semantic connection is not entirely self-evident, and bránchos is in its turn linked with brónchos "windpipe, throat," though there is no explanation for the change in vowel. If the glosses brachṓdēs: trachýs ("rough, harsh") and brakías: tracheîs tópous ("rough places") in the lexicon of the Greek grammarian Hesychius are relevant, the set of alternations brak-/brach-/branch- suggests pre-Greek substratum (see E. Furnée, Die wichtigsten Konsonantischen Erscheinungen des Vorgriechischen [Mouton, 1972], pp. 128, 276). In the case of all these words both form and meaning may be affected by folk etymology.
First Known Use
1729, in the meaning defined above
Medical Definition
branchial
adjective
bran·chi·al -kē-əl
: of or relating to the gills or to parts of the body derived from the embryonic branchial arches and clefts