Definition of ophthalmology for English Language Learners. medical : the study of the structure, functions, and diseases of the eye.
Pullet: Six Weeks to One Year. Young female chickens less than 1 year old that have fully feathered out and are about the size of large pigeons are called pullets. Expect your barred rock pullet to start laying eggs when she is about 16 to 20 weeks old. Once she begins laying, she should produce one egg every 25 hours â except during the cold, dark hours of winter when she may not lay at all -- until her first molt a year later.
Rating Newest Oldest. Best Answer: Depending on the species, Salmon lay hundreds of eggs in a lifetime. Usually in groups, not all at once. The female looks for loose, clean, medium to large stones on the river bed. Clears a depression and deposits her eggs, while the male swims overhead and deposits a cloud of sperm, called milt.