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 There are 11 fifteen-letter words containing H, M, 2O, 2R, T and Y| ARCHEOASTRONOMY | • archeoastronomy n. Alternative spelling of archaeastronomy. • ARCHEOASTRONOMY n. the scientific study of the beliefs and practices concerning astronomy that existed in ancient and prehistoric civilizations.
 |  | ECTOMYCORRHIZAE | • ectomycorrhizae n. Plural of ectomycorrhiza. • ECTOMYCORRHIZA n. a type of mycorrhiza in which the fungus forms a layer on the outside of the roots of the plant.
 |  | ECTOMYCORRHIZAS | • ectomycorrhizas n. Plural of ectomycorrhiza. • ECTOMYCORRHIZA n. a type of mycorrhiza in which the fungus forms a layer on the outside of the roots of the plant.
 |  | ELECTROMYOGRAPH | • electromyograph n. A device used in electromyography to generate electromyograms. • ELECTROMYOGRAPH n. an instrument for diagnosing neuromuscular disorders.
 |  | HEMATOPORPHYRIN | • hematoporphyrin n. (Biochemistry) The porphyrin portion of heme (minus the iron atom). • HEMATOPORPHYRIN n. any of several porphyrins that are hydrated derivatives of protoporphyrins.
 |  | HYETOMETROGRAPH | • HYETOMETROGRAPH n. an instrument for recording rainfall. |  | HYSTRICOMORPHIC | • HYSTRICOMORPHIC adj. belonging to the rodent suborder Hystricomorpha, which includes porcupines, cavies, agoutis, and chinchillas. |  | MICROPHOTOMETRY | • microphotometry n. Measurement performed with a microphotometer. • MICROPHOTOMETRY n. measurement by microphotometer, an instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate.
 |  | NORTHCOUNTRYMAN | • north␣countryman n. Someone from the north of England. • NORTHCOUNTRYMAN n. one living in the north.
 |  | NORTHCOUNTRYMEN | • north␣countrymen n. Plural of north countryman. • NORTHCOUNTRYMAN n. one living in the north.
 |  | PYROPHOTOMETERS | • PYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits. | 
 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the 1Word.ws and WikWik.org.
 
 See this list for:English Wiktionary: 100 wordsScrabble in French: no wordScrabble in Spanish: no wordScrabble in Italian: no wordScrabble in German: no wordScrabble in Romanian: no word
 
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