| emerald | (noun) the green color of an emerald | - |
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| (noun) a transparent piece of emerald that has been cut and polished and is valued as a precious gem | - |
| (noun) a green transparent form of beryl; highly valued as a gemstone | - |
| furfuraldehyde | (noun) a liquid aldehyde with a penetrating odor; made from plant hulls and corncobs; used in making furan and as a solvent | Synonyms: furfural |
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| glyceraldehyde | (noun) a sweet crystalline aldehyde formed by the breakdown of sugars | Synonyms: glyceric aldehyde |
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| herald | (noun) something that precedes and indicates the approach of something or someone | Synonyms: forerunner, harbinger, precursor, predecessor |
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| (noun) (formal) a person who announces important news | Synonyms: trumpeter |
| heraldry | (noun) emblem indicating the right of a person to bear arms | - |
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| (noun) the study and classification of armorial bearings and the tracing of genealogies | - |
| hyperaldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: aldosteronism |
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| paraldehyde | (noun) a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent | Synonyms: ethanal trimer |
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| thraldom | (noun) the state of being under the control of another person | Synonyms: bondage, slavery, thrall, thralldom |
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