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

• second best
• second childhood
• second class
• Second Coming
• Second Coming of Christ
• Second Council of Constantinople
• Second Council of Lyons
• Second Council of Nicaea
• second cousin
• second cranial nerve
• Second Crusade
• second deck
• Second Earl Grey
• Second Earl of Chatham
• Second Earl of Guilford
• Second Empire
• Second Epistel of John
• Second Epistle of Paul the Apostle to the Corinthians
• Second Epistle of Paul the Apostle to the Thessalonians
• Second Epistle of Paul the Apostle to Timothy
• Second Epistle of Peter
• Second Epistle to the Corinthians
• Second Epistle to the Thessalonians
• Second Epistle to Timothy
• second estate