| DIPHOSPHATE | • diphosphate n. (Chemistry) any salt or ester containing two phosphate groups. • diphosphate n. (Chemistry) any salt or ester of diphosphoric acid; pyrophosphate.
 • DIPHOSPHATE n. a phosphate containing two phosphate groups.
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| DIPHTHERIAS | • diphtherias n. Plural of diphtheria. • DIPHTHERIA n. an infectious throat disease in which the air-passages become covered with a leathery membrane.
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| HARPSICHORD | • harpsichord n. (Music) A musical instrument with a keyboard that produces sound through a mechanical process. When… • HARPSICHORD n. a keyboard instrument with horizontal strings that run perpendicular to the keyboard in a long tapering case and are plucked by points of quill, leather, or plastic operated by depressing the keys.
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| HEPTACHORDS | • heptachords n. Plural of heptachord. • HEPTACHORD n. a system of seven sounds.
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| HERALDSHIPS | • heraldships n. Plural of heraldship. • HERALDSHIP n. the office of a herald.
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| HYDROGRAPHS | • hydrographs n. Plural of hydrograph. • HYDROGRAPH n. a graph of variation of stream flow over time.
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| HYDROPHANES | • hydrophanes n. Plural of hydrophane. • HYDROPHANE n. a semitranslucent variety of opal that becomes translucent or transparent on immersion in water.
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| ORPHANHOODS | • orphanhoods n. Plural of orphanhood. • ORPHANHOOD n. the state of being an orphan, also ORPHANISM.
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| PHOSPHATIDE | • phosphatide n. (Chemistry) a phospholipid. • PHOSPHATIDE n. a phospholipid.
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| PLOUGHHEADS | • ploughheads n. Plural of ploughhead. • PLOUGHHEAD n. the draught iron of a plough, also PLOWHEAD.
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| RHODOPHANES | • RHODOPHANE n. the red pigment contained in the inner segments of the cones of the retina in animals. | 
| SHADOWGRAPH | • shadowgraph n. A shadow-picture; a radiograph or X-ray photograph; a sciagram. • shadowgraph n. (Physics) An optical technique of visualizing patterns of fluid flow by using differences in refractive index.
 • shadowgraph v. (Transitive) To outline in a shadow-picture on a screen.
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| SHEEPSHEADS | • sheepsheads n. Plural of sheepshead. • SHEEPSHEAD n. a large and valuable sparoid food fish found on the Atlantic coast of the United States, also SHEEPHEAD.
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