USED IN NATURAL HISTORY. 



the ancient Greek vinegar vessel, 

 called oxybaphon. Socket of the 

 hip joint. (See Cotyloid.) 



A'CETABULT'FERA. fr. lat. aceta'- 

 bidum, a little cup; fcro, I carry. 

 Applied to those cephalopods 

 that have cups or suckers on 

 their arms or tentacles. 



ACETA'RIOUS. Anything belonging 

 to the salad tribes of vegetables. 



ACHATI'NA (akate'na). fr. gr. acha- 

 tes, agate. Name of a genus of 

 terrestrial gasteropods, sometimes 

 known as the agate snails. All 

 the species of this genus are ovi'- 

 parous; one, the Achatina zebra, 

 figured on p. 41, Book v., lays eggs 

 with a hard, white shell, and as 

 large as those of a sparrow. 



ACHE'NIUM. fr. gr. a, priv. ; chaino, 

 I gape. A form of fruit. 



ACI'CULAR. Needle-shaped. 



A'CID. Sour, sharp. In chemistry 

 this term is applied to all sub- 

 stances which saturate and neu- 

 tralize alkalies and other salifia- 

 ble bases. 



ACINA'CIFORM. Scimitar-shaped. 



ACINI. Small stones in grapes, 

 strawberries, &c. 



ACI'PENSER. Lat. A Sturgeon. 



ACOTY'LEDON. fr. gr. o, without, 

 kotuledon, a seed-lobe. A class 

 of plants. 



A'COTTLE'DONOUS. Belonging or 

 relating to acoty'ledons. 



ACOU'STIC. fr. gr. akouo, I hear. 

 Relating to sound, or hearing. 



A'CRID fr. lat. acer, sharp, sour. 

 Burning, irritating. 



A'CR-ITA, fr. gr. a'kritos, indistinct. 

 A division of the animal king- 

 dom composed of the lowest 

 classes of radiate animals. 



ACROMIOJT. fr. gr. akros, extreme, 

 omos, the shoulder. The supe- 

 rior prominence of the scapula, 

 which joins the clavicle, form- 

 ing' the bony point of the shoul- 

 der. 



ACRY'DIUM. fr. gr. akris, a locust. 

 Name of a genus of insects. 



ACTI'ITIA. fr. gr. aktin, a ray. A 

 ray. A genus of polypi, with 

 very numerous tentacles, which 

 extend, like rays, from the cir- 

 cumference of the mouth {fig- 87, 

 p. 96, Book vi). 



ACTUT'OHTK and ACTT'NOLITE. 

 fr. gr. aktin, a ray ; lithos, a stone. 

 A variety of hornblende which 

 usually occurs in fascicular crys- 

 tals. There are three varieties 

 of this mineral ; crystallized, as- 

 bestous, and glassy. 



ACU'LEATES. fr. lat. aculeus, a 

 prickle. A tribe of hymenopte- 

 rous insects, in which the fe- 

 males and neuters are provided 

 with a sting, generally concealed 

 within the last segment of the 

 abdomen. 



ACULEA'TUS. Lat. Aculeate; hav- 

 ing a sharp point, (p. 49, Book 

 viii.) 



ACU'LEI. In botany, prickles; hard, 

 sharp processes of the epidermis 

 which fall off when old; they 

 are thus distinguished from spines, 

 which do not (all off. 



ACCUMINA'TUS. ) Lat. Acuminate; 



ACUMINA'TA. pointed; peak 

 ed. (p. 36, Book vii.) 



ACUMINATE. ") fr- l' dt - acumen^ a 



ACUMINATED. 3 sharp point. End- 

 ing in a point. 



ACU'TE. More gradually sharp 

 pointed than acuminate. In bo- 

 tanical language every angle is 

 acute. 



ACUTICO'STA. Lat. acutus, pointed, 

 costa, rib. Having pointed ribs or 

 sides. 



A'CUTIT.O'BA. Lat. acutus, point- 

 ed ; loba, a lobe. Having sharp 

 or pointed lobes. (Book viii. p. 88.) 



A'CUTUS. i T 



A'CCTA. f Lat. Acute j^sharp- 



A'CUTUM. $ P inted ' 



ADDU'CTOR. fr. lat. addu er. I draw 

 towards. The muscle which 

 draws the valves of a bivalve 

 shell towards each other, is so 

 called. 



