semen
n. uncountable C1 Advanced US //ˈsimən// UK //sˈiːmən// se·men
n. the thick, white liquid that comes out of a man's penis during sex. It contains the cells needed to make a baby.
n. the viscous fluid produced by the male reproductive organs that contains spermatozoa. Typically used in medical or biological contexts.
The doctor tested the semen sample for fertility.
During the biology lecture, the professor explained how semen carries sperm cells to the egg.
Forensic investigators often look for traces of semen at a crime scene to extract DNA evidence that might identify a suspect.
From Middle English semen, from Latin sēmen (“seed”), from Proto-Indo-European *seh₁- (“to sow; plant”).
Usage
Uncountable in its general sense; rarely pluralized except in specific laboratory or comparative contexts.