INV 



221 



IPO 



invaginate, v., tn-vadf-in-dt (L. 

 in, into ; vagina, a scabbard, a 

 sheath), to operate for hernia, in 

 which after reduction, the skin 

 is thrust into the canal by 

 the finger of the operator, and 

 there retained by sutures, etc. 

 till adhesion ensue : invagina- 

 tion, n., m-vadf-m-af'sTiun, the 

 operation for hernia as above, 

 also sometimes applied to intus- 

 susception. 



invermination, n., In-verm'-m-af- 

 shun (L. in, in ; vermino, I have 

 worms), the diseased condition of 

 the bowels caused by worms. 



inversion, n., m-ver'-shun (L. 

 inversus, turned bottom upwards 

 from in, in ; verto, I turn), 

 said of an organ which is com- 

 pletely or partially turned inside 

 out, as the womb : inverted, a., 

 fa'Vert'ed, in bot., having the 

 radicle of the embryo pointing to 

 the end of the seed opposite the 

 hilum; having the ovules attached 

 to the top of the ovary. 



invertebral, a., m-vert'eb-rai (L. 

 in, not ; vertebra, a joint in the 

 backbone), without a vertebral 

 column or spine bone : inverteb- 

 rate, n., m-vert'-tib-rat, an animal 

 having no spinal bone : adj. , 

 destitute of a backbone : invert- 

 ebrata, n. plu., m-vert'-eb-rat'-a, 

 the animals that are destitute of 

 backbones and an internal skelet- 

 on. 



invohicels, n. plu., in-vo'l'-us-'els 

 (F. involucelle, an involucel ; L. 

 involucrum, a wrapper), in bot., 

 the collection of bractlets, or a 

 sort of leaves, surrounding a 

 secondary or partial umbel or 

 flower head ; secondary involu- 

 cres. 



involucre, n., m'-vold'-kr (L. in- 

 volucrum, a wrapper from in, 

 into ; volvo, I roll), in bot., a 

 collection of a sort of leaves round 

 a cluster of flowers, or at some 

 distance below them ; the layer 

 of epidermis covering the spore 



cases in ferns : involucral, a., 

 m''Vdl'6 f 'kral, belonging to the 

 involucre. 



involute, a., $n'vol-6t, also invol- 

 utive, a. , tn'vtil-dltiv (L. involutus, 

 in wrapped, enclosed from in, 

 into ; volvo, I roll), in bot., hav- 

 ing the edges of leaves rolled 

 inwards spirally on each side. 



involution, n., m'-vol'd'-shun (L. 

 involutus, in wrapped from in, 

 into ; volvo, I roll), the return of 

 an organ or tissue to its original 

 state, as the womb after having 

 expelled the child. 



iodine, n., i'-od-ln (Gr. lodes, re- 

 sembling a violet in colour from 

 ion, violet ; eidos, resemblance), 

 a solid elementary substance of 

 a greyish-black colour, obtained 

 from marine plants, sea water, 

 etc., whose vapour is of a beauti- 

 ful violet colour ; applied ex- 

 ternally, it acts as an irritant : 

 iodide, n., if-od-ld, a direct com- 

 pound of iodine with a base : iod- 

 ism, n., i'-od-izm, a morbid con- 

 dition sometimes arising from the 

 continued use of iodine, or some 

 of its preparations. 



lonidium, n., i'-on-id'i-um (Gr. 

 ion, a violet ; eidos, resemblance), 

 a genus of plants, Ord. Violaceae, 

 some of whose species are used in 

 S. America as substitutes for 

 ipecacuan. 



ipecacuanha, n., ip'&kak-u-an'a, 

 also ipecacuan, n., ip'-Z-kak'-u-dn 

 (Brazilian or Portuguese), the 

 root of a S. American plant, the 

 * Cephaelis ipecacuanha, ' used in 

 med. as an emetic, etc., belong- 

 ing to the same Order, the Rubi- 

 acese (Linn. Ord. Cinchonaceae), 

 which yields the Peruvian or 

 cinchona bark. 



Ipomoea, n., ip'-om^'-a (Gr. ips, a 

 worm which infests the vine ; 

 homoios, like, so named from its 

 habit of creeping round other 

 plants like a worm), a most beauti- 

 ful genus of climbing plants, Ord. 

 Convolvulacese : Ipomoea purga, 



