13-letter words containing n, o, r, h
- housing start — an instance of beginning the construction of a dwelling.
- howler monkey — Central American simian variety
- hudson strait — a strait connecting Hudson Bay and the Atlantic. 450 miles (725 km) long; 100 miles (160 km) wide.
- humorlessness — The state, quality, or condition of lacking humor.
- hunt saboteur — A hunt saboteur is someone who tries to stop a hunt from taking place or being successful because they believe it is cruel to the animal being hunted.
- hunter's moon — the first full moon following the harvest moon in late September or early October.
- hunter's robe — pothos.
- hunting sword — a short, light saber of the 18th century, having a straight or slightly curved blade.
- hyaluronidase — Biochemistry. a mucolytic enzyme found in the testes, in snake venom, and in hemolytic streptococci and certain other bacteria, that decreases the viscosity of the intercellular matrix by breaking down hyaluronic acid.
- hybridisation — Alternative form of hybridization.
- hybridization — to cause to produce hybrids; cross.
- hydroairplane — a hydroplane.
- hydroboration — (chemistry) the production or organoboranes by the addition of diborane to unsaturated organic compounds.
- hydrocracking — the cracking of petroleum or the like in the presence of hydrogen.
- hydrodynamics — the branch of fluid dynamics that deals with liquids, including hydrostatics and hydrokinetics.
- 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.
- 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.
- 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.
- 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.
- 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.
- hypercyanotic — blueness or lividness of the skin, as from imperfectly oxygenated blood.
- hyperfunction — abnormally increased function, especially of glands or other organs.
- hypermutation — (uncountable) Frequent mutation.
- hypernephroma — Renal cell carcinoma.
- hyperpersonal — Very highly personal.
- hyperrational — characterized by excessive rationality
- hyperromantic — extremely or excessively romantic
- hypertonicity — Physiology. of or relating to hypertonia.
- hypnobirthing — the use of hypnotic techniques during labour by an expectant mother to reduce the pain and emotional stress of delivery
- hypo-chondria — Also, hypochondriasis [hahy-poh-kuh n-drahy-uh-sis] /ˌhaɪ poʊ kənˈdraɪ ə sɪs/ (Show IPA). Psychiatry. an excessive preoccupation with one's health, usually focusing on some particular symptom, as cardiac or gastric problems.
- hypobranchial — situated below the gills or beneath the branchial arches.
- hypochondriac — Also, hypochondriacal, H05/H0509000 hahy-poh-kuh n-drahy-uh-kuh l, ˌhaɪ poʊ kənˈdraɪ ə kəl. Psychiatry. pertaining to or suffering from hypochondria, an excessive preoccupation with and worry about one's health: The comedy is aimed at the hypochondriac demographic. produced by hypochondria: Hypochondriac feelings overwhelmed her.
- hypochondrium — either of two regions of the abdomen, situated on each side of the epigastrium and above the lumbar regions.
- hypohydration — Dehydration.
- hyponatraemia — a condition in which there is a low concentration of sodium in the blood
- hypoperfusion — (medicine) Decreased perfusion of blood through an organ.