精子密度 jīngzǐmìdù sperm count Origin Definitions Defs Strokes Stroke Words Sentences Sents 精子 jīngzǐ noun sperm A male reproductive cell in animals, typically motile and shaped like a tadpole, which combines with an egg to produce offspring; spermatozoon密度 mìdù noun density density; thickness; degree of concentration or closeness, such as population density or the spacing of objects