| ARCHAEOMETRIST | • archaeometrist n. A scientist whose speciality in archaeometry. • ARCHAEOMETRIST n. one who practises archaeometry.
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| AROMATHERAPIST | • aromatherapist n. (Alternative medicine) A practitioner of aromatherapy. • AROMATHERAPIST n. one who practises aromatherapy.
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| ASTROCHEMISTRY | • astrochemistry n. (Chemistry, astronomy) The study of the chemical composition of stars and outer space. • ASTROCHEMISTRY n. the study of molecules and radicals in outer space.
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| IATROCHEMISTRY | • iatrochemistry n. (Chemistry, medicine) An early branch of chemistry, having roots in alchemy, that tried to provide chemical… • IATROCHEMISTRY n. the application of chemistry to medical theory and treatment.
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| MOUTHBREATHERS | • mouthbreathers n. Plural of mouthbreather. • mouth-breathers n. Plural of mouth-breather an alternative spelling of mouth breather.
 • mouth␣breathers n. Plural of mouth breather.
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| PETROCHEMISTRY | • petrochemistry n. (Petrochemistry) The branch of chemistry that deals with petroleum, natural gas and their derivatives. • PETROCHEMISTRY n. the branch of chemistry concerned with the extraction of chemicals from petroleum.
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| STEPMOTHERLIER | • STEPMOTHERLY adj. like a stepmother. | 
| TETARTOHEDRISM | • tetartohedrism n. (Crystallography) The property of being tetartohedral. • TETARTOHEDRISM n. the state of being tetartohedral, having one fourth the number of planes required by complete symmetry.
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| TETRADRACHMONS | • tetradrachmons n. Plural of tetradrachmon. | 
| THERMOTROPISMS | • thermotropisms n. Plural of thermotropism. • THERMOTROPISM n. the growth of organism as influenced by heat.
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| TRICHROMATISMS | • trichromatisms n. Plural of trichromatism. • TRICHROMATISM n. use of the three primary colors for color reproduction; normal color vision.
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| TROPHOTROPISMS | • TROPHOTROPISM n. direction of growth by nutritional factors. | 
| ULTRAMARATHONS | • ultramarathons n. Plural of ultramarathon. • ULTRAMARATHON n. a footrace longer than a marathon.
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| WEATHEROMETERS | • weatherometers n. Plural of weatherometer. • WEATHEROMETER n. an instrument for measuring weather-resisting properties of paint.
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