ANC 



ANF 



pression of settivg off, applied to that 

 part of the process by which a slight film 

 of ink is communicated by the copy to a 

 zinc plate. 



ANA'STOMOSE (uki, through, cTo^a, 

 the mouth). A term denoting that the 

 mouths of two vessels come into contact 

 and blend together, or that two vessels 

 unite as if such kind of union had taken 

 place. 



A'NATASE. A pure oxide of tita- 

 nium, having the property of exhibiting 

 various colours by reflected light, from 

 indigo blue to reddish-brown. It occurs 

 in granite, gneiss, mica slate, and transi- 

 tion limestone. 



ANA'TIDiE. The Duck tribe; a 

 family of the Natatores, distinguished 

 by a thick bill, which is horny only at its 

 extremity ; the remainder of the man- 

 dibles being invested with a soft skin, 

 which in other birds is found only at 

 their hinder part. Under the general 

 designation of ducks, geese, and swans, 

 all the birds of this family may be ar- 

 ranged. 



ANATI'FIDA. An order of Cirrho- 

 pods, named from the genus anatifa, and 

 characterized by the peduncle by which 

 the animal is attached to its shell. See 

 Cirrhopoda. 



ANATOMICAL SYPHON. An ap- 

 paratus invented by Wolf, for the pur- 

 pose of illustrating the exertion of a very 

 great pressure, by means of a small quan- 

 tity of liquid. 



ANATOMY (ai'oi, through, re/jLvu), to 

 cut). A term simply meaning dissection, 

 bnt generally applied to the whole science 

 of organization — the science whose object 

 is the examination of the organs or in- 

 struments of life. Animal anatomy is 

 t distinguished into human anatomy and 

 comparative anatomy, according as it 

 treats of the organization of the human 

 body, or of that of other animals. 



ANA'TROPOUS (ayaxpeTrw, to turn 

 upside down). Inverted; turned entirely 

 over ; a term applied to the condition of 

 ovules in many plants, as in the apple. 

 The inversion is occasioned by the con- 

 tinued growth of only one side of the 

 ovule, until that portion of it which was 

 originally near the apex is brought down 

 to the hilum ; the base of the nucleus 

 is then at tl^e rpex of the ovule. 



ANCELLA'RINvE. An aberrant sub- 

 family of the VolutidcB, or volutes, named 

 from the genus ancellaria, having the 

 aperture wide, and the base of the pillar 

 alone thickened and striated. 

 25 



ANDALU'SITE. A massive mineral, 

 of a red colour, first found in Andalusia 

 in Spain. 



ANDA'NTE {andare, Ital., to go). A 

 term employed in Music, to denote a 

 medium movement between the extremes 

 of slow and quick. See Adagio. 



ANDR^A'CE^. An order of Cryp- 

 togamous plants, named from the genus 

 Andrsea. Branching moss-like plants, 

 having a four-valved theca, without oper- 

 culum or peristome. 



ANDRE'OLITE. A mineral first 

 found at Andreasberg, in the Hartz ; also 

 called harmotone, and, from the form of 

 its crystals, cross-stone. 



ANDROCE'UM [dv^p, a man, oIko^, a 

 house). A term applied to the male ap- 

 paratus in plants, commonly called the 

 stamens — the apices of old botanists. 



ANDRO'GYNOUS (di/r/p, a man, 71/1/^, 

 a woman). A term applied to a herma- 

 phrodite, or animal which possesses the 

 generative organs of both sexes. 



ANDRO'MEDA. A northern constel- 

 lation, so called by the Greeks from 

 Andromeda, the daughter of Cepheus. 

 It contains sixty-six stars. 



ANDRO'PHORUM {dv'nQ, a man, 

 0epcri, to bear). A term applied in 

 Botany, by Mirbel, to the tube formed 

 by the union of the filaments in a mon- 

 adelphous combination, as in passiflora. 

 ANEMO'METER (cii/ejuop, the wind, 

 merpov, a measure). An apparatus for 

 measuring the force of the wind, and in- 

 dicating its direction at every minute of 

 the day. An exterior vane is connected 

 with an index, which traverses a sheet of 

 paper in a room beneath. The index 

 being influenced by the movements of a 

 clock, and the paper being marked into 

 divisions for every hour of the day, an 

 accurate record is effected 



A'NEMOSCOPE {'dve/jio?, the wind, 

 (TKOTreto, to examine). An instrument 

 for determining the direction of the wind, 

 and so constructed that the spindle of a 

 weathercock is connected with the hand 

 of a dial on which the points of the com- 

 pass are marked. 



ANE'NTEROUS (a, priv., evrepa, 

 bowels). A term applied to the infuso- 

 rial animalcules, which have no intestinal 

 canal. 



ANFRA'CTUOUS [anfractus, a wind- 

 ing backward and forward). Spiral ; re- 

 sembling in direction the spire of a cork- 

 screw, as applied in Botany to the direc- 

 tion of a stem ; or folded back upon itself, 

 as the anther of cucumis. 



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