a grille in an automobile or the like for air cooling of the liquid in the cooling system.
[rad-i-kuh l] /ˈræd ɪ kəl/ adjective 1. of or going to the root or origin; fundamental: a radical difference. 2. thoroughgoing or extreme, especially as regards change from accepted or traditional forms: a radical change in the policy of a company. 3. favoring drastic political, economic, or social reforms: radical ideas; radical and anarchistic ideologues. […]
noun, Geometry. 1. the line such that tangents drawn from any point of the line to two given circles are equal in length. noun 1. a line from any point of which tangents to two given circles are of equal length. It is the line joining the points of intersection of two circles
noun 1. the patronage of extremists or left-wing radicals by rich or famous people, as through invitations to social functions or public expressions of support. noun the adoption of radical views, dress, or lifestyle by members of the upper class; association of the upper class with radicals
noun 1. (in the philosophy of William James) the doctrine that the only proper subject matter of philosophy is that which can be defined in terms of experience, and that relations are a part of experience. 2. (def 3b).