sperm
n. C / U C1 Advanced US //ˈspɝm// UK //spˈɜːm// sperm
n. the male reproductive cell that joins with an egg to start a new life.
n. the male gamete or reproductive cell, typically motile and smaller than the female ovum.
The doctor checked the health of the sperm cells.
Fertilization occurs when a single sperm successfully penetrates the outer layer of the egg.
Advanced microscopy allows researchers to observe the precise swimming patterns of sperm as they navigate the chemical gradients of the reproductive tract.
From Middle English sperme, from Latin sperma, from Ancient Greek σπέρμα (spérma, “seed, semen”). Compare also Old French esperme, sparme.