branchia

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bran·chi·a

 (brăng′kē-ə)
n. pl. bran·chi·ae (-kē-ē)
A gill or similar organ of respiration.

[Latin, from Greek brankhia, gills.]

branchia

(ˈbræŋkɪə)
n, pl -chiae (-kɪˌiː)
(Zoology) a gill in aquatic animals
ˈbranchiˌate adj

gill1

(gɪl)

n.
1. the respiratory organ of aquatic animals, as fish, that breathe oxygen dissolved in water.
2. one of the radial plates that bear spores on the underside of the cap of certain mushrooms.
Idioms:
1. green or white around the gills, somewhat pale, as from nausea or fright.
2. to the gills, Informal. fully; completely; to capacity.
[1300–50; < Scandinavian; compare Old Norse gjǫlnar]

gill2

(dʒɪl)

n.
a unit of liquid measure equal to ¼ of a pint (118.2937 ml).
[1225–75; Middle English gille < Old French: vat, tub < Late Latin gello, gillo water pot]

gill3

(gɪl)

n. Brit.
1. ravine.
2. a rivulet.
[1350–1400; < Old Norse gil]

gill4

(dʒɪl)

n.
a girl or young woman; sweetheart.
[1400–50; late Middle English, generic use of Gil(le), short form of a female given name, Gillian]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.branchia - respiratory organ of aquatic animals that breathe oxygen dissolved in water
ctenidium - comb-like respiratory structure serving as the gill of certain mollusks
ceras - one of the often brightly colored and branching hornlike structures on the back of the nudibranch (and other related mollusks) that serve as gills
external gill - occurs in some mollusks and in tadpoles and other immature amphibians
respiratory organ - any organ involved in the process of respiration
References in classic literature ?
Two distinct organs sometimes perform simultaneously the same function in the same individual; to give one instance, there are fish with gills or branchiae that breathe the air dissolved in the water, at the same time that they breathe free air in their swimbladders, this latter organ having a ductus pneumaticus for its supply, and being divided by highly vascular partitions.
In the higher Vertebrata the branchiae have wholly disappeared--the slits on the sides of the neck and the loop-like course of the arteries still marking in the embryo their former position.
Now I think no one will dispute that the ovigerous frena in the one family are strictly homologous with the branchiae of the other family; indeed, they graduate into each other.
On each side of the lower surface, or foot, there is a broad membrane, which appears sometimes to act as a ventilator, in causing a current of water to flow over the dorsal branchiae or lungs.
Diagnosis: The caruncle is small and hidden by the overlying peristomium and 7 pairs of branchiae are present first occurring on the second setiger.
The new species is characterized, and differs from other species of the genus mainly by the location of the first pair of branchiae, by having dichotomously branched branchiae in the mid-posterior chaetigers, the absence of subpodial papillae and the morphology of the parapodia.
Single pair of branchiae on chaetiger 1 situated just posterior to pair of palps; branchiaeapinnate, flattened, with undulating lateral edges, almost equal in length to palps and appearing similar to them Finger-like extensions of lateral.
The shell-boring polychaete species were identified on the basis of fifth setiger chaetae, prostomium and pygidium morphology, and branchiae distribution.
pilocollaris are similar in the start of the branchiae and the absence of posterior notopodial spines, but differ with respect to the maximum number of hooded hooks per fascicle and the presence of unidentate hooks posteriorly (Blake & Kudenov 1978).
Soon the crustacean encounters another creature, "the great fan worm" and Painleve reveals the worm's branchiae and vibratory cilia through high magnification.
The species of terebellid polychaete shown above has enlarged, branched curlicues, or branchiae, that help it flourish in an oxygen-minimum zone 412 meters deep on the Pacific side of Costa Rica.