13-letter words containing e, t, h, y
- heterostrophy — the condition of being heterostrophic
- heterostylism — the condition of being heterostyled
- heterozygosis — the state of being a heterozygote.
- heterozygotes — a hybrid containing genes for two unlike forms of a characteristic, and therefore not breeding true to type.
- heterozygotic — having dissimilar pairs of genes for any hereditary characteristic.
- heuristically — serving to indicate or point out; stimulating interest as a means of furthering investigation.
- hexadactylism — Sexdactyly.
- hexadactylous — hexadactylic
- hexamethylene — cyclohexane.
- hieroglyphist — a person who studies hieroglyphics; hieroglyphologist.
- high fidelity — sound reproduction over the full range of audible frequencies with very little distortion of the original signal.
- high-velocity — having an above average velocity
- homiletically — In a homiletic fashion.
- homosexuality — sexual desire or behavior directed toward a person or persons of one's own sex.
- honey stomach — the crop of an ant, bee, or other hymenopterous insect, serving as a reservoir for honeydew and nectar, especially the enlarged crop of a honeybee in which nectar is acted on by enzymes to form honey.
- honor society — (in a college, university, or secondary school) a student society that admits members on the basis of academic merit and, sometimes, worthwhile contributions in extracurricular activities.
- hormic theory — a theory that holds all behavior to be purposive, whether conscious or unconscious.
- hot and heavy — having or giving off heat; having a high temperature: a hot fire; hot coffee.
- hyacinth bean — an Old World tropical vine, Dolichos lablab, of the legume family, having purple or white flowers and black or white seeds in a papery, beaked pod.
- hybrid system — a way of working, organizing, or doing something that is composed of elements of two separate systems
- hydrargillite — gibbsite.
- hydrated lime — a soft, white, crystalline, very slightly water-soluble powder, Ca(OH) 2 , obtained by the action of water on lime: used chiefly in mortars, plasters, and cements.
- hydroelectric — pertaining to the generation and distribution of electricity derived from the energy of falling water or any other hydraulic source.
- hydrofracture — (geology) Rock fracture caused by the pressure of freezing water.
- hydrogenating — Present participle of hydrogenate.
- hydrogenation — to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).
- hydrokinetics — the branch of hydrodynamics that deals with the laws governing liquids or gases in motion.
- hydronitrogen — a chemical compound containing only hydrogen and nitrogen.
- hydrosulphate — a salt formed by the direct union of sulfuric acid with an organic base, especially an alkaloid, and usually more soluble than the base.
- hydrosulphite — hyposulfite (def 1).
- hydrotelluric — (chemistry) Formed by hydrogen and tellurium.
- hydroxyketone — a ketone containing a hydroxyl group.
- hydroxymethyl — (organic chemistry, especially in combination) The univalent radical HO-CH2-.
- hygrometrical — Alternative form of hygrometric.
- hymenopterans — Plural form of hymenopteran.
- hymenopterous — belonging or pertaining to the Hymenoptera, an order of insects having, when winged, four membranous wings, and comprising the wasps, bees, ants, ichneumon flies, and sawflies.
- hyperactivate — (biology) To cause or undergo hyperactivation.
- hyperactively — In a hyperactive manner.
- hyperactivity — the condition of being hyperactive.
- hypercautious — Especially or unreasonably cautious.
- hypercritical — excessively or meticulously critical; overcritical.
- hypercyanotic — blueness or lividness of the skin, as from imperfectly oxygenated blood.
- hyperdactylia — the presence of extra fingers or toes.
- hyperdicrotic — having or pertaining to a double beat of the pulse for each beat of the heart.
- hyperesthesia — an abnormally acute sense of pain, heat, cold, or touch; algesia.
- hyperesthetic — Relating to, or exhibiting, hyperesthesia.
- hypereutectic — (of an alloy) having more of the alloying element than the eutectoid composition.
- hyperextended — Extremely long; extended greatly.
- hyperfunction — abnormally increased function, especially of glands or other organs.
- hypergalactia — an abnormally large secretion of milk.