convolute, convoluted

& s. [Lat. con volutus, pa. par. of convolvo =to roll together, to roll round.] IMG:content-0870.png:[blocks in formation] edulis is the Sweet Potato. [BATATAS.] There are two tribes or sections of the order: Convolvulese, with the carpels consolidated, and Dich on dree, with them distinct, There are forty-six genera known and nearly 700 species. con-võlv-u-lā-cě-ous, a . [Mod. Lat. convolvu lace(a) (q. v.), and Eng. suff. -ous.] Bot .: Pertaining to the order Convolvulaceæ, and especially to its typical genus Convolvulus. con-võlv'-u-lic, a. [Lat. convolvul (us) (q. v.), and Eng. suff. -ic .] convolvulic acid, s. Chem.: C31H54018. An organic acid obtained by boiling convolvulin with baryta water, then precipitating the exce of baryta with dilute sulphuric acid, removing the exce of sulphuric acid by lead carbonate, and finally removing the lead by H2S gas. Convolvulic acid is a white amorphous bitter powder, readily soluble in water and in alcohol, insoluble in ether. Its aqueous solution is acid, and it forms salts called convolvulates. By boiling with dilute sulphuric acid, it yields sugar and convolvulinol. It is also called rhode or etic acid. con-võlv-u-lin, s. [Lat. convolvul ( us ), and Eng. suff. -in ( Chem.) (q.v.).] Chem.: C31H50016. Also called rhode ore tin. A colorle transparent resin contained in the tubers or officinal jalap-root. Convolvulin is prepared by exhausting the root of Convolvulus orizabensis with boiling water, then drying and pulverizing it, and treating it with twice its weight of ninety per cent. alcohol, mixing the alcoholic extract with water till it begins to show turbidity; then treating the liquid twice with animal charcoal, distilling the alcohol from the filtrate, repeatedly treating the residual pulverized resin (amounting to between ten and fifteen per cent. of the root) with ether; di olving the residue in the smallest po ible quantity of absolute alcohol, and precipitating with ether till the precipitate is quite free from resin soluble in ether. The residue is pure convolvulin. Convolvulin is tastele and inodorous, nearly insoluble in water. When dry it melts at 150°, forming a yellow, transparent liquid; it burns with a smoky flame. Finely divided convolvulin di olves in aqueous alkalies, and is converted into convolvulic acid. When di olved in alcohol it is decomposed by hydrochloric acid, yielding convolvulinol and glucose. It di olves in strong sul. phuric acid, forming a carmine color, which after 2. The twists or folds of anything rolled about ward turns brown and deposits a dark brown IMG:content-0871.png:[blocks in formation] the latter are named anfractuosities or sulci. As a Chemistry: Convolvulinolic acid, rhode retinol ne . The dividing fi ures vary in depth with the rule the depth of a convolution exceeds its thick age of the individual, and (theoretically at least) with the amount of exercise con-võlv-u-lin-öl, s . [Eng. convolvulin , and Lat. ol ( eum ).] (CH3HO. Obtained by the action of dilute of emulsin on convolvulic acid. It forms achits inodorous needle crystals, which have a bit soluble in alcohol; it melts at 39°. It volatilizes when nitric acid into functions receives, those of a thoughtful, intelligent ing bitter taste, slightly soluble in water, readily person being deeper than those of a wittol or stupid. Each has received a name; thus there are heated on platinum foil; the vapors cause cough the angular, the marginal, the supra-marginal, the hippocampal, and other convolutions. "Their skulls are smaller, and the convolutions of the brainle complex than in normal men." Darwin : Descent of Man (1871), pt. i., ch. iv., vol. i., p. 121. con-vo-lû-tive, a. [Mod. Lat. convolutivus .] Bot.: The same as CONVOLUTE (q. v). con-võlve, v. t. [From Lat. convolvo =to roll together: con together, and volvo =to roll.] To roll together. "Huge trunks! and each particular trunk a growth Of intertwisted fibers serpentine Upcoiling, and inveterately convolved." Words worth: Yew-trees. con-võlved, pa. par. & a. [CONVOLVE.] con-võlv-ing, pr. par. & a. [CONVOLVE.] ing. It is oxidized by concentrated sulphuric acid colors it first yellow, then amaranth-red. It di olves in alkalies, and parts with water, becoming C13H2403, which is considered to be the true acid; it melts at 42°. It forms salts, called convolvuli no lates.