- habit
- habitat
- habitus
- haemoglobin
- hallux
- haploid
- hatching
- Hauts-Plateaux
- heathland
- Helping points
- hematocrit
- Hennigian
- herbivory
- hermaphrodite
- herpetology
- Heterochrony
- heterogamety
- heteromorphic
- heterotroph
- heterotrophic
- heterozygous
- hibernate
- high mountain domain
- Historical biogeography
- holarctic
- Holocene
- holotype
- homeotherms
- Homeotic mutation
- Homologous
- homology
- Homonym
- Homoplasy
- homopteran
- honeycombed
- hormone
- host
- Hot spot
- Hova
- humerus
- hybrid
- Hybrid zone
- hypertrophied
- hypocone