Term: optical density: (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
Broader: density: the amount per unit size | Unrelated: knot: a sandpiper that breeds in the Arctic and winters in the southern hemisphere
Broader: density: the amount per unit size | Unrelated: molding: the act of creating something by casting it in a mold
Broader: density: the amount per unit size | Unrelated: burqa: a loose garment (usually with veiled holes for the eyes) worn by Muslim women especially in India and Pakistan
Broader: density: the amount per unit size | Unrelated: command module: a space module in which astronauts can live and control the spacecraft and communicate with earth
Broader: density: the amount per unit size | Unrelated: ball-buster: a demanding woman who destroys men's confidence
Broader: density: the amount per unit size | Unrelated: coue: French psychotherapist who claimed that if one imagined one was getting better, one would get better (1857-1926)
Broader: density: the amount per unit size | Unrelated: drunkard: a chronic drinker
Broader: density: the amount per unit size | Unrelated: discovery: something that is discovered
Broader: density: the amount per unit size | Unrelated: doctor of science: an honorary degree in science
Broader: density: the amount per unit size | Unrelated: gonococcus: the pus-producing bacterium that causes gonorrhea