- herrenvolk
- herrerasaur
- herrerasaurus
- herrick
- herring
- herring gull
- herring hog
- herring salad
- herringbone
- herringbone pattern
- herschel
- herschelian telescope
- hershey
- hershey bar
- hertfordshire
- hertha
- hertz
- hertzian
- hertzian wave
- herzberg
- heshvan
- hesiod
- hesitance
- hesitancy
- hesitant
- hesitantly
- hesitate
- hesitater
- hesitating
- hesitatingly
- hesitation
- hesitator
- hesperian
- hesperides
- hesperiphona
- hesperiphona vespertina
- hesperis
- hesperis matronalis
- hesperus
- hess
- hesse
- hessian
- hessian boot
- hessian fly
- hessonite
- hestia
- het
- het up
- heteranthera
- heteranthera dubia
- heterobasidiomycetes
- heterocephalus
- heterocercal
- heterocercal fin
- heterocycle
- heterocyclic
- heterocyclic compound
- heterocyclic ring
- heterodactyl
- heterodactyl foot
- heterodon
- heterodox
- heterodoxy
- heterodyne
- heterodyne oscillator
- heterodyne receiver
- heteroecious
- heterogeneity
- heterogeneous
- heterogeneousness
- heterogenesis
- heterogenous
- heterograft
- heteroicous
- heterokontae
- heterokontophyta
- heterologic
- heterological
- heterologous
- heterology
- heteromeles
- heteromeles arbutifolia
- heterometabolic
- heterometabolism
- heterometabolous
- heterometaboly
- heteromyidae
- heteronym
- heterophil antibody
- heterophil test
- heterophile antibody
- heteroploid
- heteroploidy
- heteroptera
- heteropterous insect
- heteroscelus
- heteroscelus incanus
- heterosexism
- heterosexual
- heterosexual person
- heterosexualism
- heterosexuality
- heterosis
- heterosomata
- heterosporous
- heterospory
- heterostracan
- heterostraci
- heterotaxy
- heterotheca
- heterotheca villosa
- heterothermic
- heterotrichales
- heterotroph
- heterotrophic
- heterozygosity
- heterozygote
- heterozygous
- heth
- heuchera
- heuchera americana
- heuchera cylindrica
- heuchera sanguinea
- heulandite
- heuristic
- heuristic program
- heuristic rule
- hevea
- hevea brasiliensis
- hevesy
- hew
- hew out
- hewer
- hewn
- hex
- hex nut
- hexachlorophene
- hexacosanoic acid
- hexad
- hexadecanoic acid
- hexadecimal
- hexadecimal digit
- hexadecimal notation
- hexadecimal number system
- hexadecimal system
- hexadrol
- hexagon
- hexagonal
- hexagram
- hexagrammidae
- hexagrammos
- hexagrammos decagrammus
- hexahedron
- hexalectris
- hexalectris spicata
- hexalectris warnockii
- hexameter
- hexamita
- hexanchidae
- hexanchus
- hexanchus griseus
- hexane
- hexanedioic acid
- hexangular
- hexanoic acid
- hexapod
- hexapoda
- hexed
- hexenbesen
- hexestrol
- hexose
- heyday
- heyerdahl
- heyrovsky
- heyse
- heyward
- hezbollah
- hezekiah
- hf
- hfc
- hg
- hhs
- hi
- hiatal hernia
- hiatus
- hiatus hernia
- hiawatha
- hiba arborvitae
- hibachi
- hibbertia
- hibbing
- hibernal
- hibernate
- hibernating
- hibernation
- hibernia
- hibiscus
- hibiscus cannabinus
- hibiscus elatus
- hibiscus esculentus