1. The age of an embryo counting from the time of fertilization
   - fertilization age, gestational age, foetal age [Brit, Cdn], fertilisation age [Brit]

Derived forms: fetal ages

Type of: age

• crossflow
• crosshairs
• crosshatch
• crosshatched
• crosshead
• crossheading
• crossing
• crossing guard
• crossing over
• crossjack
• crosslet
• crossly
• crossness
• crossopterygian
• Crossopterygii
• crossover
• crossover voter
• crosspatch
• crosspiece
• crossroad
• crossroads
• crossruff
• crosstalk
• crosstie
• crosstown