‖n. pl. [ NL., from Gr. 'a priv. + &unr_;, pl., the gills of fishes. ] (Zool.) A group of annelids, so called because the species composing it have no special organs of respiration. [ 1913 Webster ]

a. (Zool.) Without gills. [ 1913 Webster ]

n. [ L. archiatrus, Gr. &unr_;; pref. &unr_; + &unr_; physician, &unr_; to heal. ] Chief physician; -- a term applied, on the continent of Europe, to the first or body physician of princes and to the first physician of some cities. P. Cyc. [ 1913 Webster ]

‖n. pl. [ See Brachiate. ] (Zool.) A division of the Crinoidea, including those furnished with long jointed arms. See Crinoidea. [ 1913 Webster ]

a. [ L. brachiatus (bracch-) with boughs or branches like arms, from brackium (bracch-) arm. ] (Bot.) Having branches in pairs, decussated, all nearly horizontal, and each pair at right angles with the next, as in the maple and lilac. [ 1913 Webster ]

a. (Anat.) Furnished with branchiæ; as, branchiate segments. [ 1913 Webster ]

a. [ L. caducus falling (fr. cadere to fall) + E. branchiate. ] (Zool.) With temporary gills: -- applied to those Amphibia in which the gills do not remain in adult life. [ 1913 Webster ]

‖n. pl. [ NL., from L. caput, capitis, head + -branchiae gills. ] (Zool.) A division of annelids in which the gills arise from or near the head. See Tubicola. [ 1913 Webster ]

‖n. pl. [ NL., fr. E. cirrus + L. branchiae gills. ] (Zool.) A division of Mollusca having slender, cirriform appendages near the mouth; the Scaphopoda. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. krypto`s hidden + L. branchia a gill. ] (Zool.) (a) A division of the Amphibia; the Derotremata. (b) A group of nudibranch mollusks. [ 1913 Webster ]

a. (Zool.) Having concealed or rudimentary gills. [ 1913 Webster ]

a. [ Cyclo- + branchiate. ] (Zool) Having the gills around the margin of the body, as certain limpets. [ 1913 Webster ]

‖n. pl. [ NL. ] (Zool.) A group of nudibranch mollusks without special gills. [ 1913 Webster ]

a. [ Derm + branchiate. ] (Zool.) Having the skin modified to serve as a gill. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. di- = di`s- twice + &unr_; gills. ] (Zool.) An order of cephalopods which includes those with two gills, an apparatus for emitting an inky fluid, and either eight or ten cephalic arms bearing suckers or hooks, as the octopi and squids. See Cephalopoda. [ 1913 Webster ]

a. (Zool.) Having two gills. -- n. One of the Dibranchiata. [ 1913 Webster ]

‖n. pl. [ NL., from L. dorsum back + branchiae gills. ] (Zool.) A division of chætopod annelids in which the branchiæ are along the back, on each side, or on the parapodia. [ See Illusts. under Annelida and Chætopoda. ] [ 1913 Webster ]

a. (Zool.) Having branchiæ along the back; belonging to the Dorsibranchiata. -- n. One of the Dorsibranchiata. [ 1913 Webster ]

a. (Zoöl.) Of or pertaining to Elasmobranchii. -- n. One of the Elasmobranchii. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. "y`dwr water + &unr_; gills.] (Zool.) An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera. -- Hy`dro*bran"chi*ate a. [ 1913 Webster ]

n. pl. [ NL. See Inferobranchiate. ] (Zool.) A suborder of marine gastropod mollusks, in which the gills are between the foot and the mantle. [ 1913 Webster ]

a. [ L. inferus lower + E. branchiate. ] (Zool.) Having the gills on the sides of the body, under the margin of the mantle; belonging to the Inferobranchiata. [ 1913 Webster ]

a. (Anat.) Same as Ischial. [ 1913 Webster ]

{ ‖‖ } n. pl. [ NL. See lamella, and Branchia, Branchiate. ] (Zool.) An earlier name for the class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc., now called Pelecypoda or Bivalvia. [ 1913 Webster +PJC ]

☞ They usually have two (rarely but one) flat, lamelliform gills on each side of the body. They have an imperfectly developed head, concealed within the shell, whence they are called Acephala. Called also Conchifera, and Pelecypoda. See Bivalve. [ 1913 Webster ]

a. (Zool.) Having lamellar gills; belonging to the Lamellibranchia (also called Pelecypoda). -- n. One of the Lamellibranchia (also called Pelecypoda). [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Lophobranchii. [ 1913 Webster ]

‖n. pl. [ NL. See Notum, and Branchia. ] (Zool.) (a) A division of nudibranchiate mollusks having gills upon the back. (b) The Dorsibranchiata. [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Notobranchiata. [ 1913 Webster ]

‖n. pl. [ NL. See Nucleus, and Branchia ] (Zool.) See Heteropoda. [ 1913 Webster ]

a. [ L. nudus naked + brachium an arm. ] (Zool.) Having tentacles without vibratile cilia. Carpenter. [ 1913 Webster ]

‖n. pl. [ NL. See Nude, and Branchia. ] (Zool.) A division of opisthobranchiate mollusks, having no shell except while very young. The gills are naked and situated upon the back or sides. See Ceratobranchia. [ 1913 Webster ]

a. & n. (Zool.) Same as Nudibranch. [ 1913 Webster ]

{ ‖ } n. pl. [ NL., from Gr. 'o`pisqen behind + &unr_; gills. ] (Zool.) A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs. [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Opisthobranchiata. -- n. One of the Opisthobranchiata. [ 1913 Webster ]

‖n. pl. [ NL. ] (Zool.) Same as Brachiopoda. [ 1913 Webster ]

a. [ See Pallium, and Branchia. ] (Zool.) Having the pallium, or mantle, acting as a gill, as in brachiopods. [ 1913 Webster ]

‖n. pl. [ NL. See Pecten, and Branchia. ] (Zool.) A division of Gastropoda, including those that have a comblike gill upon the neck. [ 1913 Webster ]

a. [ L. pecten, -inis, a comb + E. branchiate. ] (Zool.) Having pectinated gills. [ 1913 Webster ]

‖n. pl. [ NL., fr. pellis garment + branchia a gill. ] (Zool.) A division of Nudibranchiata, in which the mantle itself serves as a gill. [ 1913 Webster ]

‖n. pl. [ NL. See Perennial, and Branchia. ] (Zool.) Those Batrachia which retain their gills through life, as the menobranchus. [ 1913 Webster ]

a. [ See Perennial, and Branchiate. ] 1. (Anat.) Having branchæ, or gills, through life; -- said especially of certain Amphibia, like the menobranchus. Opposed to caducibranchiate. [ 1913 Webster ]

2. (Zool.) Belonging to the Perennibranchiata. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. &unr_; forward, further + &unr_; a gill. ] (Zool.) The highest division, or subclass, of gastropod mollusks, including those that have the gills situated anteriorly, or forward of the heart, and the sexes separate. [ 1913 Webster ]

a. (Med.) Of or pertaining to psychiatry. [ 1913 Webster ]

{ ‖ } n. [ NL. psychiatria, fr. Gr. &unr_; the mind + &unr_; healing. ] (Med.) The application of the healing art to mental diseases. Dunglison. [ 1913 Webster ]

‖n. pl. [ NL. ], . a. & n. (Zool.) Same as Pulmonibranchiata, -ate. [ 1913 Webster ]

‖n. pl. [ NL., fr. L. pulmo, -onis, a lung + Gr. &unr_; a gill. ] (Zool.) Same as Pulmonata. [ 1913 Webster ]

a. & n. (Zool.) Same as Pulmonate. [ 1913 Webster ]

‖n. pl. [ NL. See Scutum, and Branchia. ] (Zool.) An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike. [ 1913 Webster ]

☞ It is now usually regarded as including only the Rhipidoglossa and the Docoglossa. When originally established, it included a heterogenous group of mollusks having shieldlike shells, such as Haliotis, Fissurella, Carinaria, etc. [ 1913 Webster ]

a. (Zool.) Having the gills protected by a shieldlike shell; of or pertaining to the Scutibranchiata. -- n. One of the Scutibranchiata. [ 1913 Webster ]

‖n. pl. [ NL. See Siphon, and Branchia. ] (Zool.) A tribe of gastropods having the mantle border, on one or both sides, prolonged in the form of a spout through which water enters the gill cavity. The shell itself is not always siphonostomatous in this group. [ 1913 Webster ]