ETYM Old Eng. glem, gleam, AS. glaem, prob. akin to Eng. glimmer.
1. A flash of light (especially reflected light); SYN. gleaming, glimmer.
2. An appearance of reflected light; SYN. gleaming, glow, lambency.

1. A feeble or intermittent light
2. A subdued unsteady shining or sparkle
3. A dim perception or faint idea; inkling
4. Hint, spark

(Homonym: re).
1. (Mathematics) A straight line extending from a point.
2. A branch of an umbel or an umbelliform inflorescence.
3. Any of the stiff bony rods in the fin of a fish.
4. A thin line suggesting a ray: as any of a group of lines diverging from a common center; half line.
5. Particle, trace.