1. Having male and female reproductive organs in separate plants or animals
   - dioecian

Antonym: monoecious

Encyclopedia: Dioecious

• western meadowlark
• Western mountain ash
• western mugwort
• western narrow-mouthed toad
• western omelet
• Western paper birch
• Western pasqueflower
• western pipistrel
• western poison oak
• western poppy
• western prince's pine
• western ragweed
• Western rattlesnake
• western red cedar
• western red-backed salamander
• western redbud
• Western ribbon snake
• Western Roman Empire
• Western saddle
• Western Sahara
• Western Samoa
• Western Samoan monetary unit
• Western sand cherry
• western sandwich
• western saxifrage