||Ar*thri"tis (är*thr"ts), n. [L., fr. Gr. 'arqri^tis (as if fem. of 'arqri`tis belonging to the joints, sc. no`sos disease) gout, fr. 'a`rqron a joint.] (Med.) Any inflammation of the joints, particularly the gout.
Ar"thro*derm (&?;), n. [Gr. 'a`rqron joint + 'derm.] (Zoöl.) The external covering of an Arthropod.
||Ar*thro"di*a (&?;), n. [NL., fr. Gr. &?;, fr. &?; well articulated; 'a`rqron a joint + &?; shape.] (Anat.) A form of diarthrodial articulation in which the articular surfaces are nearly flat, so that they form only an imperfect ball and socket.
{ Ar*thro"di*al (&?;), Ar*throd"ic (&?;), } a. Of or pertaining to arthrodia.
||Ar`thro*dyn"i*a (&?;), n. [NL., fr. Gr. 'a`rqron joint + 'ody`nh pain.] (Med.) An affection characterized by pain in or about a joint, not dependent upon structural disease.
Ar`thro*dyn"ic, a. Pertaining to arthrodynia, or pain in the joints; rheumatic.
||Ar`thro*gas"tra (&?;), n. pl. [NL., fr. Gr. 'a`rqron joint + &?; stomach.] (Zoöl.) A division of the Arachnida, having the abdomen annulated, including the scorpions, harvestmen, etc.; pedipalpi.
Ar*throg"ra*phy (&?;), n. [Gr. 'a`rqron joint + -graphy.] The description of joints.
Ar*throl"o*gy, n. [Gr. 'a`rqron joint + -logy.] That part of anatomy which treats of joints.
Ar"thro*mere (&?;), n. [Gr. 'a`rqron joint + -mere.] (Zoöl.) One of the body segments of Arthropods. See Arthrostraca. Packard.
||Ar`thro*pleu"ra (&?;), n. [NL., fr. Gr. 'a`rqron joint + &?; the side.] (Zoöl.) The side or limb-bearing portion of an arthromere.
Ar"thro*pod (&?;), n. (Zoöl.) One of the Arthropoda.
||Ar*throp"o*da (&?;), n. pl. [NL., fr. Gr. 'a`rqron joint + -poda.] (Zoöl.) A large division of Articulata, embracing all those that have jointed legs. It includes Insects, Arachnida, Pychnogonida, and Crustacea. -- Ar*throp"o*dal (&?;), a.
||Ar`thro*pom"a*ta (&?;), n. pl. [NL., fr. Gr. 'a`rqron joint + &?; lid.] (Zoöl.) One of the orders of Branchiopoda. See Branchiopoda.
||Ar*thro"sis (&?;), n. [NL., fr. Gr. &?;, fr. 'a`rqron joint.] (Anat.) Articulation.
||Ar*thros"tra*ca, n. pl. [NL., fr. Gr. 'a`rqron joint + &?; a shell.] (Zoöl.) One of the larger divisions of Crustacea, so called because the thorax and abdomen are both segmented; Tetradecapoda. It includes the Amphipoda and Isopoda.
Ar`thro*zo"ic (&?;), a. [Gr. 'a`rqron joint + &?; animal, fr. &?; an animal.] (Zoöl.) Of or pertaining to the Articulata; articulate.
Ar"ti*ad (&?;), a. [Gr. &?; even, fr. &?; exactly.] (Chem.) Even; not odd; -- said of elementary substances and of radicals the valence of which is divisible by two without a remainder.
Ar"ti*choke (&?;), n. [It. articiocco, perh. corrupted fr. the same word as carciofo; cf. older spellings archiciocco, archicioffo, carciocco, and Sp. alcachofa, Pg. alcachofra; prob. fr. Ar. al-harshaf, al-kharshf.] (Bot.) 1. The Cynara scolymus, a plant somewhat resembling a thistle, with a dilated, imbricated, and prickly involucre. The head (to which the name is also applied) is composed of numerous oval scales, inclosing the florets, sitting on a broad receptacle, which, with the fleshy base of the scales, is much esteemed as an article of food.