DIPLEIDOSCOPE n.
An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is…
DISAPPOINT v. 2 definitions
pointed of his hopes or expectations, or his hopes, desires, intentions, expectations, or plans are disappointed; a bad season disappoints the farmer of his crops; a defeat disappoints an enemy of his spoil. I was disappointed, but very agreeably. Macaulay.
DISCOID a. 2 definitions
Having the form of a disk, as those univalve shells which have the whorls in one plane, so as to form a disk, as the pearly nautilus. Discoid flower (Bot.), a compound flower, consisting of tubular florets only, as a tansy, lacking the rays which are seen in the daisy and sunflower.