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 ATM ( 502 ) A T R terlperfed; it has many teeth in the lips, bat none in rounds the earth for a great height. For the height and the tongue or jaws. It is found in the frefti waters other properties of the atmofphere, fee Pneumatics. or Carolin,a, and fpawns in April. ATOM, in philofophy, a particle of matter, fo minute ATHEROMA, in medicine, a tumour without pain or as to admit of no divifion. Atoms are the minima nadifcolouring of the fltin,, containing, in a membrana- ture, and are conceived as the firft principles or comceous bag, matter like pus, intermixed with hard and ponent parts of all phyfical magnitude. See Cheftony corpufcles, mistry. ATHERTON, a town of Warwickfliire, fituated about ATOMICAL phil'jfophy, or the dodtrine of atoms, a ten miles north of Coventry, in i° 30' W. long, and fyftem which, from the hypothefis that atoms are endued with gravity and motion, accounted for the orij2° 40'' N. lat. ATHLETiE, in antiquity, men of remarkable ftrength gin and formation of things. This philofophy was and agility, difciplined to perform in the public games. firft broached by Mofchus, fome time before the Trojan This was a general term, under which were compre- war ; but was much cultivated and improved by Epihended wreillers, boxers, runners, leapers, throwers curus, whence it is denominated the Epicurean philoof the difc, and thofe who praftifed in other exercifes fophy. See Epicurean. exhibited in the Olympic, Pythian, and other folemn ATONICS, in grammar, words not accented.. See Acfports, wherein there were prizes allotted for the con- cent. querors. ATONY, in medicine, a defedl of tone or tenfion, or a, ATHLONE, aftrong town in the county of Weftmeath, laxity or debility of the folids of the body. in the province of Connaught in Ireland, fituated on ATRA BILI3, black bile, one of the humours of the the river Shannon, about 60 miles weft of Dublin, in ancient phyficians ; which the moderns call melan8° j'W. long, and 530 20' N.dat. choly. ATHOL, a diftridt of Perthfhire in Scotland, from ATRACTYLIS, in botany, a genus of the fyngenefia whence the ancient and noble family of Murray takes polygamia requalis clafs. The corolla is radiated, and each corolla of the radius has five teeth. The fpecies the title of duhe. ATHOS, a celebrated mountain, fituated in the province are three, none of which are natives of Britain. of Macedonia, on a peninfula, which ftretches into the ATRAGENE, in botany, a genus of the polyandria Aegean fea, near the gulf of Contefla, being an entire polygynia clafs. The calix has four leaves; the pechain of mountains extended near feven miles in length, tals are 12 ; and the feeds are caudated. There are and three in breadth. It is now called Monte Santo, three fpecies, all natives of the eaft. from the 22 monafteries, befides cells and caves, upon ATRAPHYXIS, in botany, a genus of the hexandria it, containing near 6000 monks and hermits; no wo- digynia clafs. The calix has two leaves ; the petals man is allowed to come within fight of their convents. are two, and finuated ; and there is but one feed. There It is fituated 70 miles eaft of Salonichi, or Theffalo- are two fpecies ; viz. the fpinofa, a native of Media ; nica, and pays confiderable tribute to the Turks, it and the undulata, a native of ^Ethiopia. being under the proteftion of the boftangi bafcha ; on ATRAlTI, in medicine, infants having no perforation this chain formerly flood five cities. N. Lat. 40° io' in the anus, or perfons imperforated in the vagina or urethra. E. long. 26° 20'. a town of the Farther Abruzzo, in the kingdom ATHY, a town of Ireland, in the county of Kildare and ATRI, province of Leinfter, fituated on the 0river Barrow, of Naples, fituated in ij° id E. long, and 420 40' about 100 miles fouth of Kildare, in 7 5' W. long, N lat. ATRICAPILLA, in ornithology, a trivial name of a and 53 N. lat, ATIGNY, a fmall town of Champaign in France, fitu- fpecies of mufcicapa; and alfo of a fpecies ofmotacilla. See Muscicapa, and Motacilla. ated0on the river Aifne, about 20 miles fouth ofRheims, ATRICES, or Attrices, in medicine, tubercles about in 4 40'E. long, and 490 25^. lat. the anus, reckoned a kind of condylomata. ATINGUACU, in ornithology. See Cuculus. ATLANTIC OCEAN, that bounded by Europe and ATRICI, in furgery, fmall finufes in the extremity of the inteftinum reftum, which do not perforate into its Africa on the eaft, and by America on the weft. cavity. ATLANTIDES, in aftronomy. See Pleiades. in botany, a genus of the polygamia moATLAS the name of a ridge of mountains, running from ATRIPLEX, clafs. The calix of th@ hermaphrodite flower eaft to weft through the north of Africa, from whence noecia has five leaves ; it has no corolla; the ftamina are the Atlantic Ocean took its name. Atlas, in architefture, the fame with telamon. See five, and the ftylus is divided into two parts ; there is but one deprefted feed. The calix of the female flower Telamon. two leaves ; it has no corolla nor ftamina; the ftyAtlas, in anatomy, the name by which fome call the has firft vertebra of the neckfo called in allufion to Mount lus is divided into two parts ; and there is but one deprefled feed. The fpecies are 12, of which eight are Atlas. Seep. 167. natives of Britain; viz. the portulacoides, or fea-pur.Atlas, in matters of literature, denotes a book of uni- flain; the lacineata, or jagged fea-orache ; thehaftata, verfid geography, containing maps of all the known or fpear-leaved orache ; the eredta, or wild orache parts of the world. or ATMOSPHERE, the vaft colleflion of air which fur- the.patula, or narrow-leaved orache; the ferrata, indented.;