radiator

[English radiat (e); -or.] That which radiates; a body or substance from which rays radiate; spec if., a chamber or drum in an apartment, heated by steam or hot air, and radiat ing warmth into the apartment. răd-i-cal, *răd-1-call, a . & s. [Fr. radical , from Lat.radix (gen it. radicis ) = a root; Sp. & Port. radical ; Ital. radicale .] [RADIX.] A. As adjective: I. Ordinary Language: 1. Pertaining to or proceeding from the root. 2. Pertaining to the root or origin; fundamental, original; going to the root or origin; thoroughgoing, extreme; as, a radical truth, a radical difference. 3. Implanted by nature; natural, native, innate, constitutional. "Are radical diseases so suddenly removed?"-Dryden: Ancis. (Ded.) 4. In the same sense as II. 3. II. Technically : 1. Bot .: Arising from the root or from its crown. 2. Philol.: Belonging to or proceeding directly from a root; of the nature or character of a root; original, primitive; not derived. "A subordinate part, indicating some modification or relation of a radical idea."-Whitney: Life and Growth of Language, ch. x. 3. Politics: Pertaining to or characteristic of the political party known as Radicals. [Β. 4.] B. As substantive: I. Ordinary Language: One who favors extreme measures as opposed to those who are more conservative. "The radicals said all the members of all the unions would go out to-day. The conservatives said many unions would not go out and that many members of the striking unions would refuse to go with their unions." -Chicago Tribune, July 11, 1894. II. Technically : 1. Chem.: A group of elements common to a more or le numerous series of allied compounds, and unaffected by the proce es whereby these compounds are transformed one into another, e. g., Ethyl (C2H5), the radical of common alcohol (C2H2HO). 2. Math .: An indicated root of an imperfect power of the degree indicated. Radicals are divided into orders according to the degree of the root indicated; thus, an indicated square root of an imperfect square is a radical of the second degree, and so on. 3. Philology: (1) A radix, root, or simple underived, uncompounded word. [ROOT, 8.] (2) A letter which belongs to the root; a primitive letter. 4. English Politics : An ultra-liberal, verging on Republicanism; one of that party in the state which desires to carry out a radical reform of the constitution, and to give greater power to the democracy. The term was first used in England and applied as a party name in 1818 to Henry Hunt, Major Cartwright, and others of the same party, who wished to introduce radical reforms in the representative system, and not merely to disfranchise and enfranchise a borough or two. (Brewer.) In the United States the term was applied to members of the republican party who favored the so-called "reconstruction policy" of the government. radical-ba , s. IMG:content-0163.png:[blocks in formation] Thus the expre ion 64 indicates that the cube root of 64 is to be extracted, and 3 is the index of the radical. In the case of the square root, the index number is generally omitted, and the sign only written.