GLOSSARY. 



Having a tendency to become 

 sour. 



Acetabulif erous (Acetab'ulum; fero, 

 I bear). Having acetabula or 

 sucking-cups. 



Acetab'uium (Lat. a saucer). The 

 round cup-like cavity in the pelvic 

 bone, into which the head of the 

 thigh-bone is received ; applied also 

 to the sucking -cups of some inver- 

 tebrate animals. 



Ac'etate (Lat. acetum, vinegar). A 

 compound of acetic acid with a base. 



Ace'tic(Lat. acetum, vinegar). Belong- 

 ing to vinegar. 



Acetom'eter (Lat. acetum,, vinegar ; 

 (Jr. fAfrpov, metron, a measure). 

 An instrument for measuring the 

 strength of vinegar. 



Ace'tous (Lat. acetum, vinegar). 

 Sour : producing vinegar. 



Ac'etyl (Lat. acetum, vinegar ; Gr. 

 V\TJ, hull, material). The supposed 

 base of vinegar and its allies. 



Ache'nium (Gr. d, a, not; x atl/0 > 

 chaino, I gape). A form of fruit 

 consisting of a single hard pericarp, 

 not splitting, and inclosing a single 

 non-adherent seed. 



Achlamyd / eous(Gr. o, a, not; xta/w?, 

 chlamus, a garment). A terra ap- 

 plied to plants, the flowers of which 

 have neither calyx nor corolla. 



Achromat'ic (Gr. d, a, not ; xpupa., 

 chroma, colour). Free from colour : 

 applied to optical instruments in 

 which the confusing effect of chro- 

 matic aberration, or decomposition 

 of light into colours, is avoided. 



Achro'matism (Gr. o, a, not ; XP^M"* 

 chroma, colour). Freedom from 

 colour : applied to optical instru- 

 ments which do not decompose light 

 so as to produce colours. 



Acic'ular (L&t.acic'ula, a little needle). 

 Occurring in needle-like crystals. 



Acid (Lat. aceo, I am sour). In com- 

 mon meaning, sour ; in chemistry, 

 applied to all bodies which combine 

 with bases to form salts. 



Acidifi'able (Lat. ac'idus, acid ; fio, 

 I become). Capable of being con- 

 verted into an acid, or made 

 acid. 



Acid'ify (Lat. ac'idus, acid ; facio, I 



make). To make acid, or change 

 into an acid. 



Acidim'eter (Lat. ac'idus, acid ; Gr. 

 perpov, metron, a measure). An 

 instrument for ascertaining the 

 quantity of acid in a fluid. 



Acid salt. In chemistry, a name 

 given to some salts which have an 

 acid reaction. 



Acid'ulate (Lat. ac'idus, acid ; dim. 

 ulus). To make slightly acid. 



Acid'ulous (Lat. ac'idus, acid ; dim. 

 ulus). Slightly or mildly acid. 



Acinac'iform. (Gr. anivaKtis, aJcinakes, 

 a scimitar ; Lat. forma, shape). 

 Like a scimitar ; in botany, ap- 

 plied to leaves which are convex 

 and sharp on one side, and straight 

 and thick on the other. 



Ac'ini (Lat. ac'inus, a grape-stone). 

 The secreting parts of glands, when 

 suspended like grains or small ber- 

 ries to a slender stem. 



Acin'ifonn (Lat. ac'inus, a grape- 

 stone ; forma, shape). In clusters 

 like grapes. 



Ac'inose (Lat. ac'inus, a grape-stone). 

 Consisting of small granular con- 

 cretions. 



Acme (Gr. UK^, acme, a point). The 

 height or extreme limit. 



Acotyle'donous (Gr. o, a, not ; KorvXrj- 

 Swv, kotuledon, a cup, or seed-lobe). 

 Having no seed-lobes, or leaves 

 which first appear above ground. 



Acous'tic (Gr. O.KOVOD, akouo, I hear). 

 Relating to sound and hearing. 



Acous'tics (Gr. O.KOVK, akouo, I hear). 

 The science which describes the 

 phenomena of sound. 



Ac'rita (Gr. d/cpiros, aJc'ritos, unar- 

 ranged). A term applied to the 

 lowest animals,.in which the tissues 

 were supposed to be confusedly 

 blended together. 



Ac'rodont (Gr. aitpos, akros, at the 

 summit ; oSous, odous, a tooth). A 

 term applied to fossil scaly saurian s, 

 which have the teeth anchylosed to 

 the summit of the alveolar ridge. 



Ac'rogen (Gr. d/cpos, akros, high or 

 extreme ; yevvaca, gennao, I pro- 

 duce). A class of vegetables charac- 

 terised by growing from the top 01 

 point. 



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