Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  shimmer, play(verb) a weak and tremulous light. 2  shimmer(verb) shine with a weak or fitful light. 3  shimmer(verb) give off a shimmering reflection, as of silk.
Cats, like humans, have both rods and cones in the retina. Rods are the receptors that the eye uses for night time viewing and sudden movement. Cones are used during the daytime, and process color information. Cats have more rods than cones, as compared with humans, making cat night vision superior to humans.
Pine cones are the reproductive organs of pine trees. The cones are either male or female. Most pine tree species have both sexes of cones on each tree. The male cones produce pollen and the female cones produce ovules.The pollen and ovules must come into contact to fertilize and produce the next generation of pine trees.he cones are either male or female. Most pine tree species have both sexes of cones on each tree. The male cones produce pollen and the female cones produce ovules.