Inbred strains (also called inbred lines, or for animals linear animals) are individuals of a particular species which are nearly identical to each other in genotype due to long inbreeding.
Freebase(3.00 / 2 votes)Rate this definition: Sunlight. Sunlight is a portion of the electromagnetic radiation given off by the Sun, particularly infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through the Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon.
Definition of dawn. 1  1 : the first appearance of light in the morning followed by sunrise danced till dawn at the crack of dawn Almost before the first faint sign of dawn appeared she arose again â¦ â Thomas Hardy. 2  2 : beginning the dawn of the space age.