AHA 



increase in size into the earth, 

 where they ripen their seeds, 

 usually called the underground 

 kidney -bean or ground-nut ; an 

 oil is expressed from their ends, 

 used for cramps in India, and 

 occasionally as a substitute for 

 cod-liver oil in medicine. 



Arachnida, n. plu., ar-ak'-md-a 

 (Gr. arachne, a spider, a spider's 

 web), a class of the Articulata, 

 comprising spiders, scorpions, 

 and ticks: arachnitis, n., dr^dk- 

 nlt f 'is, inflammation of the arach- 

 noid membrane ; sometimes ap- 

 plied to the inflammation of the 

 membranes of the brain : arach- 

 noid, a., dr-ak'-noyd (Gr. eidos, 

 resemblance), applied to a mem- 

 brane of the brain ; in bot. , ap- 

 plied to fine hairs so entangled 

 as to resemble a cobweb. 



AraliacesB, n. plu., ar-al'i'ds'-Z-e 

 (aralia, an American word), the 

 Ivy family : Aralia, n. plu., dr- 

 dl'-i-d, a genus of the above, one 

 species of which has fragrant and 

 aromatic roots which are used in 

 America as a substitute for sarsa- 

 parilla : araliaceous, a., dr-dl'i- 

 d'-shus, pert, to the Aralia. 



Aranthocephalis, n.,dr-dnth'd'Sef'- 

 dl-is (probably Gr. arachne, a 

 spider ; antlios, a flower ; kephale, 

 the head), an Order of intestinal 

 parasites ; the armed worms. 



araucaria, n. plu., dr r -aur'kdr'i-d 

 (araucanos, its name in Chili), 

 the Norfolk Island pine, famed 

 for its size and for its wood : 

 araucarites, n. plu., dr-dw- 

 kdr-Uz, the fossil wood whose 

 structure is identical with the 

 living araucaria. 



arbor vitae cerebelli, drb'tir vlt'e 

 sZr'8-bel'li (L. arbor, a tree; vitce, 

 of life ; cerebelli, of a small or 

 little brain), the tree of life of the 

 brain ; the foliated or arborescent 

 appearance presented by either 

 hemisphere of the cerebellum 

 when a vertical section is made 

 through it: arbor vitse uterinus, 



31 ARC 



ut'Vr'in'iis (L. uterinus, uterine), 

 the uterine tree of life ; the 

 appearance of branches from the 

 stem of a tree presented by the 

 folds on the interior of the * cer- 

 vix uteri. ' 



arborescent, a., dr'-bor-Zs'ent (L. 

 arborescens, growing into a tree 

 from arbor, a tree), branched like 

 a tree. 



Arbutus, n., dr'-but-us (L. arbutus, 

 the wild strawberry or arbute 

 tree), a genus of plants, Ord. 

 Ericaceas : Arbutus unedo, un'-ed-o 

 (L. unedo, the arbute or straw- 

 berry tree said to be from unus, 

 one, and edo, I eat), the straw- 

 berry tree, so called from its 

 fruit resembling a strawberry ; 

 the fruit is not agreeable, but a 

 wine is prepared from it in Cor- 

 sica: arbutean, a., dr-but'e-dn 

 pert. to. 



archangelica, n., drk'-dn-jel'-ik-a 

 (Gr. arcJws, chief, and angelica, 

 from its supposed virtues), the 

 botanical name for the Angelica 

 plant and root. 



archegonium, n . , drk^i-gon^i- um 

 (Gr. arche, beginning; gone, 

 seed), in bot., the young female 

 cellular organ in cryptogamic 

 plants ; the early condition of a 

 spore case. 



Archencephala, n. plu., drk'Zn* 

 sZf'-dl'd (Gr. archo, I command, 

 I rule over; engkephalos, the 

 brain), Owen's name for his 

 fourth and highest group of 

 Mammalia, comprisingman alone. 



archil, n., drtsh f -il (Fr. orcheil: 

 Sp. orchilla from Sp. roca, a 

 rock), a rich purple colour, ob- 

 tained from the lichen Koccella 

 tinctoria, found growing on the 

 rocks of the Canaries and other 

 islands. 



archisperms, n. plu., drk'-i-spermz 

 (Gr. archos, chief; sperma, seed), 

 another name for gymnosperms. 



arciform, a., drs f -i'f8rm (L. arcus, 

 a bow ; forma, shape), applied in 

 the medulla oblongata to some 



