(astronomy) A nebula that consists of dust which reflects starlight and appears blue in photographs.

A telescope which produces a magnified image by reflecting light through a series of mirrors housed in a tube, using a large curved mirror to gather the light and one or more additional mirrors to transmit the light to an eyepiece.

a microscope whose objective is composed of two mirrors, one convex and the other concave; it is free of chromatic aberration

To consider a weighty topic or idea.

An astronomical instrument for measuring angles, like the sextant or Hadley's quadrant, by the reflection of light from two plane mirrors which it carries, and differing from the sextant chiefly in having an entire circle.

plural of reflecting circle

present participle of reflect upon

Third-person singular simple present indicative form of reflect upon

A water feature consisting of a shallow pool of water with a reflective surface, undisturbed by fountain jets.

plural of reflecting pool