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

Derived forms: foetal ages

Type of: age

• spiral galaxy
• spiral nebula
• spiral ratchet screwdriver
• spiral spring
• spiral-shelled
• spiraling
• spiralling
• spirally
• spirant
• Spiranthes
• Spiranthes cernua
• Spiranthes porrifolia
• Spiranthes romanzoffiana
• Spiranthes spiralis
• spire
• spirea
• spired
• spirilla
• Spirillaceae
• spirillum
• spirillum fever
• Spirillum minus
• spirit
• spirit away
• spirit gum