1. (biology) a hypothesis of directed evolution (as opposed to natural selection of random variations)

Encyclopedia: Orthogenesis

• Haplopappus spinulosus
• Haplosporidia
• haplosporidian
• haplotype
• haply
• happen
• happen upon
• happening
• happenstance
• happily
• happiness
• happy
• happy chance
• happy event
• happy hour
• happy-clappy
• happy-go-lucky
• Hapsburg
• haptic
• haptic sensation
• haptically
• haptoglobin
• Harakat al-Jihad al-Islami al-Filastini
• Harakat ul-Jihad-I-Islami
• harakiri