noun
fertilized egg
Technical and everyday term for an egg that has been fertilized, used in biology, agriculture, and cooking. Often contrasted with 無精卵 (unfertilized egg).
See also: 受精卵
有精卵は温めるとひよこが孵ることがある。
A fertilized egg may hatch into a chick if kept warm.
スーパーで売っている卵のほとんどは無精卵で、有精卵は特別な表示がある。
Most eggs sold at supermarkets are unfertilized; fertilized eggs have a special label.
無精卵 is an unfertilized egg, the direct opposite of 有精卵.
Compound of 有精 (yūsei, 'fertilized') + 卵 (ran, 'egg'). The exact historical derivation is uncertain, but the kanji composition transparently reflects the meaning.