1. The alternation of two or more different forms in the life cycle of a plant or animal
   - alternation of generations, xenogenesis

Type of: organic phenomenon

• heelpost
• heels over head
• heeltap
• Hefa
• heffalump
• heft
• heft up
• heftily
• heftiness
• hefty
• hegari
• Hegel
• Hegelian
• hegemon
• hegemonic
• hegemony
• hegira
• Heidegger
• Heidelberg man
• heifer
• heigh-ho
• height
• heighten
• heightening
• heights