/
ˈɛmbrɪəʊ/
n.
 (pl. embryos)
  - an unborn or unhatched offspring in the process of development, especially an unborn human in the first eight weeks from conception. Compare with fetus.
 - Botany  the part of a seed which develops into a new plant.
 
Phrase
- in embryo
 at a rudimentary stage. 
Derivative
- embryonal
  
/ˈɛmbrɪən(ə)l/
 adj. 
Etymology
ME: via late L. from Gk embruon ‘fetus’, from em- ‘into’ + bruein ‘grow’.