Merriam-Webster's Collegiate® Dictionary, 11th Edition
DAUGHTER
I. noun
Etymology: Middle English, doughter, from Old English dohtor; akin to Old High German tohter daughter, Greek thygatēr Date: before 12th century
1. a female offspring especially of human parents, a female adopted child, a human female descendant, something considered as a daughter , an atomic species that is the product of the radioactive decay of a given element, daughterless adjective
II. adjective
Date: 1614
having the characteristics or relationship of a daughter, belonging to the first generation of offspring, organelles, or molecules produced by reproduction, division, or replication