AGO 



[7] 



ALB 



Union ; cohesion ; the state of being 

 glued, or fastened together by some 

 viscid matter ; the adhesion of parts by 

 the effusion of a coagulating medium. 



AGGLU'TINATIVE. That which has the 

 property of causing agglutination. 



A'GGREGATE. (aggregat, Fr.) 



1. The complex, or collective result of 

 the conjunction, or acervation, of many 

 particulars : it differs from a compound 

 body, inasmuch as the union in the last 

 is more intimate than between the parts 

 of an aggregate. 



2. In botany, a term used to express 

 flowers composed of many small florets, 

 having a common undivided receptacle, 

 the anthers separate and distant, the 

 florets commonly standing on stalks, each 

 having a single or double partial calyx. 

 They are opposed to simple flowers, and 

 are usually divided into seven kinds. 



A'GGREGATE. (aggrego, Lat.) To collect 

 together ; to accumulate. 



A'GGREGATED. Collected ; accumulated ; 

 heaped together. 



AGGREGATION, (aggregation, Fr. aggr6- 

 gazione, It.) The collection into one mass 

 of bodies having no natural connexion, 

 but, by a species of union, made to con- 

 stitute one body. 



A'GITATE. (agito, Lat.) To put in mo- 

 tion ; to shake. 



AGITA'TION. (agitatio, Lat.) The state 

 of being moved, or shaken. 



AGNO'STUS. (ayvwcrroc, Gr.) A fossil, 

 genus of trilobites, mentioned by M. 

 Brongniart. 



AGNOTHE'RIUM. An extinct animal of the 

 miocene period, order Mammalia, allied 

 to the dog, but of very large size. One 

 species only has been found, at Epples- 

 heim, in Germany. 



AIGUE MARI'NE. A variety of topaz, of a 

 bluish or pale green colour. 



AIGUILLES, (aiguilles, Fr.) The needle - 

 like points, or tops, of granitic rocks. 



AIGUI'LLE DE DRU. A pyramidal granitic 

 mountain, according to Bakewell, the 

 most remarkable at present known ; the 

 upper part, or spire, rises above its base 

 nearly to a point, in one solid shaft, more 

 than 4000 feet ; the summit being 11,000 

 feet above the level of the sea. 



A'LA. (ala, Lat.) 



1. In botany, a term used for the hollow, 

 which either the leaf, or the pedicle of 

 the leaf, makes with the stalk ; the hol- 

 low turning, or sinus, placed between 

 the stalk or branch of a plant and the 

 leaf, and whence a new offspring generally 

 rises. Sometimes it is used for those 

 parts of leaves otherwise called lobes or 

 wings. Those petals of papilionaceous 

 flowers placed between those other petals, 

 distinguished as the vexillum and carina, 



and which constitute the top and bottom 

 of the flower, are also called alae. 

 2. In anatomy, the lobes of the liver, the 

 cartilages of the nostrils, and the cartila- 

 ginous parts of the ears, are called alse. 



ALA'TED. (alatm, Lat.) That hath wings ; 

 winged. 



A'LABASTER. (Alabaster, Lat. aXaflaa- 

 rpov, Gr. ) Granular, or massive sulphate 

 of lime. Alabaster is found in this coun- 

 try accompanying the salt deposits in Che- 

 shire. It is also most abundant at Mont- 

 martre, in the neighbourhood of Paris. 

 At Montaiont, in Italy, it is found in 

 blocks of such magnitude, that statues of 

 the size of life are occasionally cut from 

 them. Being semi-transparent, it has 

 sometimes been employed for windows 

 instead of glass, and a church at Florence 

 is still illuminated by alabaster windows. 

 Instead of panes of glass, there are slabs 

 of alabaster 15 feet high, each of which 

 forms a single window, through which the 

 light is conveyed. Alabaster maybe turned 

 by the lathe, and is thus formed into a 

 great variety of ornamental articles. 



ALABA'STRITES. (alabastrites, Lat. d\a- 

 jSaffrpiTrjg, Gr.) Alabaster stone ; a 

 kind of marble, whereof the ancients 

 made vessels for ointment ; by Horace 

 called onyx. 



A'LALITE. Called also Diopside, a variety 

 of augite. It occurs massive, dissemi- 

 nated, and crystallized, with a vitreous 

 external, and pearly internal lustre ; it is 

 translucent, and either white or of a pale 

 green colour. It was named by Bon- 

 voisin, from his finding a variety of it 

 near the village of Ala, in Piedmont. 



ALA'SMODON. A species of shells of the 

 genus Unio, having cardinal, but no la- 

 teral teeth. 



A'LATE. 3 (alatus, Lat.) Winged. In 



ALA'TED. $ conchology, applied to shells 

 having an expanded lip, or when any por- 

 tion of them is much expanded. 



A'LARY. (from ala, Lat.) Of the nature 

 of wings. 



A'LBITE. Tetarto-prismatic felspar ; soda 

 felspar. A name given to felspar, whose 

 alkali is soda instead of potash. Colour 

 generally white, sometimes grey, green, 

 or red. Lustre upon faces of cleavage 

 pearly, in other directions vitreous. Al- 

 bite forms a constituent part of the green- 

 stone rocks in the neighbourhood of 

 Edinburgh. It is composed of silica, 

 alumina, and soda, with a trace of lime. 



ALBI'TIC. Of the nature of albite; con- 

 taining albite. 



ALBUGI'NEA. (from albus, Lat.) 



1. The fibrous membrane in the eye, 

 situate immediately under the tunica 

 conjunctiva. 



2. One of the tunics of the testis. 



