| BOROHYDRIDES | • borohydrides n. Plural of borohydride. • BOROHYDRIDE n. a compound of boron and hydrogen, used as a reducing agent. |
| CHLOROHYDRIN | • chlorohydrin n. (Organic chemistry) Any halohydrin in which the halogen is chlorine. • CHLOROHYDRIN n. any of various organic compounds derived from diols or polyhydroxy alcohols by substitution of chlorine for part of the hydroxyl groups. |
| HORRENDOUSLY | • horrendously adv. In a horrendous manner. • HORRENDOUS adv. fearful; frightful. |
| HYDROCARBONS | • hydrocarbons n. Plural of hydrocarbon. • HYDROCARBON n. a compound of hydrogen and carbon with nothing else, occurring notably in oil, natural gas and coal. |
| HYDROCHLORIC | • hydrochloric adj. (Chemistry) Of or relating to hydrochloric acid. • HYDROCHLORIC adj. applied to an acid composed of hydrogen and chlorine, hydrogen chloride, still sometimes called muriatic acid. |
| HYDROFLUORIC | • hydrofluoric adj. (Chemistry) Containing hydrogen and fluorine. • HYDROFLUORIC adj. as in hydrofluoric acid, a strong acid used for etching glass. |
| HYDROFORMING | • hydroforming n. (Engineering) A cost-effective way of shaping malleable metals into lightweight, stiff pieces by means… • hydroforming n. (Organic chemistry) The reaction of petroleum with hydrogen. • HYDROFORMING n. the catalytic reforming of petroleum to increase the proportion of aromatic and branched-chain hydrocarbons. |
| HYDROGENATOR | • hydrogenator n. (Chemistry) A device that hydrogenates. • HYDROGENATOR n. an agent that hydrogenates. |
| HYDROMETEORS | • hydrometeors n. Plural of hydrometeor. • HYDROMETEOR n. a general term for the aqueous phenomena of the atmosphere, as rain, snow, sleet, hail. |
| HYDROMORPHIC | • hydromorphic adj. Synonym of hydric (“requiring moisture”). • hydromorphic adj. (Soil science) Formed in the presence of an excess of water. • HYDROMORPHIC adj. developed in the presence of an excess of moisture which tends to suppress aerobic factors in soil-building. |
| HYDROTROPISM | • hydrotropism n. (Biology) The movement of a plant (or other organism) in response to water, either towards or away from water. • HYDROTROPISM n. growth in the direction of water. |
| OTHERWORLDLY | • otherworldly adj. Of, concerned with, or preoccupied with a different world than that of the tangible here and now, such… • otherworldly adj. Not belonging to the real world; unnatural; odd and unfamiliar. • other-worldly adj. Alternative spelling of otherworldly. |
| PYRITOHEDRON | • pyritohedron n. (Mathematics) An irregular dodecahedron, the faces of which are identical but irregular pentagons. • pyritohedron n. (Mineralogy) The shape of one of the crystal habits of pyrite. • PYRITOHEDRON n. a pentagonal dodecahedron. |
| UNROADWORTHY | • unroadworthy adj. Describing a vehicle which is not safe for use on the road. • UNROADWORTHY adj. not roadworthy. |