13-letter words containing r, y, o
- hydrofracking — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
- hydrofracture — (geology) Rock fracture caused by the pressure of freezing water.
- hydrogen bomb — a bomb, more powerful than an atomic bomb, that derives its explosive energy from the thermonuclear fusion reaction of hydrogen isotopes.
- hydrogen bond — a type of chemical bond in which a hydrogen atom that has a covalent link with one of the electronegative atoms (F, N, O) forms an electrostatic link with another electronegative atom in the same or another molecule.
- hydrogenating — Present participle of hydrogenate.
- hydrogenation — to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).
- hydrogenizing — Present participle of hydrogenize.
- hydrokinetics — the branch of hydrodynamics that deals with the laws governing liquids or gases in motion.
- hydromedusoid — a jellyfish or something resembling a jellyfish that lives in water
- hydromorphone — A synthetic narcotic analgesic, (4,5 alpha-epoxy-3-hydroxy-17-methyl morphinan-6-one), similar to morphine and heroin. It is used for moderate to severe pain under the trade name Dilaudid.
- hydronitrogen — a chemical compound containing only hydrogen and nitrogen.
- hydronium ion — the hydrogen ion bonded to a molecule of water, H 3 O + , the form in which hydrogen ions are found in aqueous solution.
- hydropathical — Alternative form of hydropathic.
- hydroperoxide — any chemical compound having the general formula, ROOH, where R is an element or an organic group.
- hydrostatical — Alternative form of hydrostatic.
- hydrosulfides — Plural form of hydrosulfide.
- hydrosulfuric — (chemistry) Derived from hydrogen sulfide considered as hydrosulfuric acid.
- 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.
- hydrosulphide — a compound containing the univalent group –HS.
- hydrosulphite — hyposulfite (def 1).
- hydrotelluric — (chemistry) Formed by hydrogen and tellurium.
- hydroxide ion — the anion OH−.
- hydroxyketone — a ketone containing a hydroxyl group.
- hydroxylamine — an unstable, weakly basic, crystalline compound, NH 3 O, used as a reducing agent, analytical reagent, and chemical intermediate.
- hydroxylation — (organic chemistry) The introduction of a hydroxyl group into a molecule, especially by the replacement of a hydrogen atom.
- 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.
- hymenorrhaphy — (medicine) Reconstructive surgery in which a woman's hymen is restored to the unbroken condition ordinarily characteristic of virginity.
- hyperadenosis — abnormal enlargement of the glands, especially of the lymph nodes.
- hyperbolising — to use hyperbole; exaggerate.
- hyperboloidal — Having the shape or form of a hyperboloid.
- hypercautious — Especially or unreasonably cautious.
- hypercyanotic — blueness or lividness of the skin, as from imperfectly oxygenated blood.
- hyperdicrotic — having or pertaining to a double beat of the pulse for each beat of the heart.
- hyperfunction — abnormally increased function, especially of glands or other organs.
- hyperhidrosis — abnormally excessive sweating.
- hyperlordosis — Particularly severe lordosis.
- hypermegasoma — gigantism.
- hypermetropia — a condition of the eye in which parallel rays are focused behind the retina, distant objects being seen more distinctly than near ones; farsightedness (opposed to myopia).
- hypermetropic — Exhibiting or relating to hypermetropia.
- hypermobility — An excess amount of elasticity in a bodily joint.
- hypermorality — conformity to the rules of right conduct; moral or virtuous conduct.
- hypermotility — excessive motility of the stomach or intestine (opposed to hypomotility).
- hypermutation — (uncountable) Frequent mutation.
- hypernephroma — Renal cell carcinoma.
- hyperpersonal — Very highly personal.
- hyperpolarize — to increase the difference in electric potential across (a cell membrane).
- hyperproducer — an increased or rapid producer