Annular 



A DICTIONARY 



Antherozoid 



AN'NULAR, in the form of a cir- 

 cle or zone. 



ANNULAR DUCTS, see Vessels. 



ANNULAR VESSELg. vessels 

 marked with thickenings in 

 the form of a ring. 



ANNULATE, marked with rings 

 or circular transverse lines; an- 

 niented. 



AN'NUlATED, see Annulate. 



ANNULA'TION, a ring or belt. 



AN'NULOSE, furnished with or 

 composed of rings. 



AN'NULUS (pi. An'nuli), any 

 body in the form of a ring; the 

 ring or band of thick-walled 

 cells in 'the sporangium of 

 most ferns which by contrac- 

 tion bursts the sporangium and 

 liberates the spores; the ring 

 of cells upon the inner side of 

 the base of the peristome at 

 the orifice of the theca in many 

 species of mosses which is 

 thrown off to detach the oper- 

 culum; the ring on the stem of 

 mushrooms; the abortive foliar 

 sheath at the base of the spike 

 in Equisetum. 



An'6dAl, see Anodic. 



ANdD'IC, applied to the edge of 

 a leaf which a leaf -spiral leaves 

 in its upward course. In a 

 right-handed spiral it would 

 be the right edge of the leaf, 

 and vice versa. Compare 

 Cathodic. 



AnOM'ALOUS, unusual in appear- 

 ance; contrary to rule; abnor- 

 mal; irregular. 



AnCM'AlIt, any deviation from 

 the essential or usual character. 



AN'SULATE, coiled at the apex 

 and the whole coil bent over so 

 as to make a loop projecting 

 above the coil, as the growing 

 extremity of the vine of the 

 musk-melon. 



AN' TECH AMBER, the upper 



(outer) angle or space between 

 the guard-cells of a stoma. 

 Compare Vestibule. 



ANTEN'NiE (sing. Anten'na), 

 two slender horn-like prolonga- 

 tions of the rostellum in the 

 genus Catasetum in orchids 

 which, upon being touched by 

 an insect or other object, cause 

 the liberation of the retinacu- 

 lum at their base and the ejec- 

 tion of the pollinium. 



AntEP6§I'TI0N, see Superposi- 

 tion. 



ANTE'RlO-POSTE'RIOR PLANE, 

 see Median Plane. 



ANTE'RidR, the side of a flower, 

 leaf, or other organ away 

 from the main stem or axis; 

 inferior; exterior; iu front. 

 Compare Dorsal. 



ANTHE LA, a paniculate cyme 

 with the lateral axes over- 

 topping the central, as in 

 many species of Juncus and 

 Luzula. 



AN'THEMt, a flower-cluster of 

 any kind. (Obs.) 



AN'THER, the pollen-bearing 

 part of a stamen. 



AN'THERID'IUM (pi. Anther- 

 Id'ia), the male organ in the 

 higher cryptogams within 

 which antherozoids are pro- 

 duced. 



AnTHERLF'EROUS, anther-bear- 

 ing. 



AN'THER-LOBES, the cells or 

 sacs of an anther, usually two 

 in number, containing the 

 pollen. 



AN'THEROID, anther-like. 



Anther6sp6rAn'6Ium (pi. 



Antherosporan'gia), see Micro- 



SPOUANGIUM. 



ANTHEROZOID, one of the mo- 

 tile fertilizing bodies produced 

 in an antheridium; spermato- 

 zoid. 



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