[ˌhetəˈrəusis]
杂种优势：从生长发育、生存及生育力的测定，显示第一代的杂种的活力优于其父母株- retrograde
- retrography
- retrogression
- retroinfection
- retrojection
- retromorphosis
- retroperitoneal
- retroperitoneum
- retroperitonitis
- retropharyngitis
- retropharynx
- retroplacental
- retroplasia
- retroposed
- retroposition
- retropulsion
- retrosine
- retrosinus
- retrospondylolisthesis
- retrostalsis
- retrosternal
- retrosymphysial
- retrouterine
- retroversioflexion
- retroversion