| CHALCEDONYX | • chalcedonyx n. (Mineralogy) An agate formed of a white opaque chalcedony alternating with a greyish translucent chalcedony. • CHALCEDONYX n. an agate of alternating white opaque and greyish transparent chalcedony.
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| CHALCEDONYXES | • CHALCEDONYX n. an agate of alternating white opaque and greyish transparent chalcedony. | 
| HYDROXYLAMINE | • hydroxylamine n. (Inorganic chemistry) An explosive inorganic derivative of ammonia, NH2OH, used as a reducing agent… • hydroxylamine n. (Organic chemistry) Any organic derivative of this compound.
 • HYDROXYLAMINE n. a colorless odorless nitrogenous base that resembles ammonia in its reactions.
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| HYDROXYLAMINES | • hydroxylamines n. Plural of hydroxylamine. • HYDROXYLAMINE n. a colorless odorless nitrogenous base that resembles ammonia in its reactions.
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| HYDROXYPROLINE | • hydroxyproline n. (Biochemistry) A hydroxy derivative of the amino acid proline found in the structural proteins of connective tissue. • HYDROXYPROLINE n. an amino acid.
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| HYDROXYPROLINES | • hydroxyprolines n. Plural of hydroxyproline. • HYDROXYPROLINE n. an amino acid.
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| HYDROXYZINE | • hydroxyzine n. (Pharmacology) A first-generation antihistamine of the piperazine class, used as an antihistamine, antiemetic… • HYDROXYZINE n. a compound used as an antihistamine and tranquilizer.
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| HYDROXYZINES | • hydroxyzines n. Plural of hydroxyzine. • HYDROXYZINE n. a compound used as an antihistamine and tranquilizer.
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| HYPEREXTEND | • hyperextend v. (Medicine) To extend a joint beyond its normal position in a way that stresses the ligaments, often causing injury. • HYPEREXTEND v. to extend so that the angle between bones of a joint is greater than normal.
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| HYPEREXTENDED | • hyperextended adj. Extremely long; extended greatly. • hyperextended v. Simple past tense and past participle of hyperextend.
 • HYPEREXTEND v. to extend so that the angle between bones of a joint is greater than normal.
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| HYPEREXTENDING | • hyperextending v. Present participle of hyperextend. • HYPEREXTEND v. to extend so that the angle between bones of a joint is greater than normal.
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| HYPEREXTENDS | • hyperextends v. Third-person singular simple present indicative form of hyperextend. • HYPEREXTEND v. to extend so that the angle between bones of a joint is greater than normal.
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| NEOORTHODOXY | • Neoorthodoxy n. Alternative form of Neo-orthodoxy. • neo-orthodoxy n. (Christianity, theology) A theological movement developed in the aftermath of World War I, largely a…
 • Neo-orthodoxy n. Alternative letter-case form of neo-orthodoxy.
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| OXYHYDROGEN | • oxyhydrogen adj. Of, or using a mixture of, hydrogen and oxygen. • oxyhydrogen n. (Chemistry) A potentially explosive mixture of hydrogen and oxygen.
 • oxy-hydrogen n. Alternative spelling of oxyhydrogen.
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| OXYHYDROGENS | • OXYHYDROGEN n. a mixture of hydrogen and oxygen used to provide an intense flame for welding. |