ACI 



18 



ACO 



hydrate was formerly used in the same 



sense. "VVe have also the composed 



terms binaqueov*, teraqueous, &c. 



ACIDIF'EROUS, from ccidwn and fero, 

 containing acid. 



ACID'IFIABLE, from acidum and^Jo, ca- 

 pable of being converted into an acid. 

 Substances with this property are called 

 radicals, or acidifidble bases. 



ACIDIFICATION , the formation of an acid. 



ACIDIFYING, that which combines with 

 an acidinable substance is called the acid- 

 ifying principle, or acidifier. 



ACIDIMETER, from acid and f&troov. 

 measure. An instrument to show the 

 strength of acids. 



ACIDIMF.TRY, the measurement of the 

 strength of acids, by saturating a given 

 weight of them with an alkaline base. 

 The quantity necessary is the measure of 

 their strength. 



ACIDULOUS, Lat. acidulus, somewhat 

 acid ; sub-acid. Applied to salts in which 

 the base is combined with such an excess 

 of acid that they manifestly exhibit acid 

 properties. 



ACILIUS, a genus of coleopterous insects 

 of the tribe of hydrocanthari of Latreille. 

 Name from cilium, in reference to the 

 hairy elytra of the females. 



ACINACIFORM, Lat. acinaciformis, from 

 aeinaees, a cimeter, and forma, form. 

 Cimeter-shaped, applied to leaves, one 

 edge of which is straight and thick, and 

 the other curved and thin. 



A'CINI, plural of acinus Granulations ; 

 compound berries. 



ACINO'FUS, a genus of insects belonging 

 to the tribe of carabici, of Linnaeus. Karne 

 from acinus and pes, which is in some 

 measure descriptive. 



A'CINOS, the generic name of the com- 

 mon basil-thyme (thymus acinos. Lin.) 

 Class didynamia, order gymnospermia. 

 " Name, otxivof, ab oe,x.ri, acies." 



A'CINOSE, from acinus, granular. A T- 

 riety of iron ore found in masses, and 

 commonly lenticular. Col. generally 

 brownish red ; lust, metallic ; text, gra- 

 nular; brittle. 



A'CINUS, Lat. from otxivo?, a grape. 

 Each part of a compound berry contain- 

 ing a seed, e. g. the blackberry has many 

 acini united. The term is used in oppo- 

 sition to baccee, or such berries as grow 

 single. 2. A genus of plants of the class 

 didynamia, and order gymnospermia. 



A'CIPENSER, a genus of fishes of the 

 order stunones or chondropterygii branchiis 

 liberis (i.e. with free branchiae). The 

 sturgeon, sterlet, and paddle-fish of the 

 Mississippi, are examples. Acipenser, or 

 tccipenser, is the ancient name ; sturio 

 (whence sturgeon) is the modern. 



ACITU, a name of the water-hare, or 

 tr*t crested grebe or direr. 



ACKNOWLEDGMENT, confession. In law, 

 a declaration or avowal of one's own act, 

 to give it legal validity, e. g. the acknow- 

 ledgment of a deed before a proper officer. 

 Acknowledgment-money, in some parts of 

 England, is a sum paid by tenants on the 

 death of their landlords, as an acknow- 

 ledgment of their new lords. 



ACME, from etzf&vi, the top or highest 

 point. In medicine, the height or crisis of 

 a disease. Old medical writers divide the 

 progress of disease into four stages : 1 

 aq%r,, the beginning; 2. avp<n? , the 

 increase; 3. ot.xfjt.vi. the height, or matu- 

 rity : 4. tfct^euiu,'/,, the decline. 



ACMEL'LA, a genus of plants of the class 

 syngenesia, and order polygamia sitperflua. 

 There are three species, all annuals : two 

 natives of South America ; one Mauritius 

 (a stove plant). 



AC'MITE, a mineral of a brownish-black 

 colour, opaque, and brittle ; fracture im- 

 perfect conchoidal. Its constituents are 

 silica, 53 '25 ; oxide of iron, 31 '25 ; soda- 

 10'4, with traces of oxide of manganese 

 and lime. It resembles paratomous 

 augite-spar in a remarkable degree. Lo- 

 cality, Eger, in Norway, where it is found 

 imbedded in granite. Name from a.xjjur tt 

 a point, from the form of its crystals. 



AC'NA, or AC'NE, from %**. An erup- 

 tion of hard, inflamed tubercles, on the 

 face, whioh are sometimes permanent for 

 a considerable time, and sometimes sepa- 

 rate very slowly. 



ACNES'TIS UuM*Tfw)i that part of the 

 spine, in quadrupeds, between the shoul- 

 der-blades and the loins. 



ACNI'DA, Tirginian or bastard hemp , a 

 genus of plants of the class dio>cia, and 

 order hexandria. Locality, North Ame- 

 rica. There is only one species. A hardy- 

 annual. 



ACO'LOQY, Lat. acologia, from MXO;, a 

 remedy, and lo^of, doctrine. The doc- 

 trine of remedies; usually restricted to 

 surgical remedies. 



ACOLU'THIA (xxo^evBux.} , the service in 

 the Greek church, or the book whick 

 contains it. 



AC'OLYTE, or ACOL'OTHIST, from a.x- 

 XeuBes- In the ancient church, a subor- 

 dinate officer who trimmed the lamps, 

 prepared the elements for sacraments, 

 waited on the bishops, &c. An officer of 

 a similar kind is still employed in the 

 Romish church. 



ACON, an instrument, resembling the 

 discus, used in ancient exercises ; also 

 the name of an ancient order of knight 

 hood. 



ACO'NDTLOUS, or ACOXDTI.OSE, Lat. nrrr/n. 

 dylus, without joint; applied to the stulkj 

 of plants which have no joints. 



