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There are 11 fifteen-letter words containing H, 3O, 2R and 2T

ASTROPHOTOGRAPHastrophotograph n. Alternative form of astrophoto.
ASTROPHOTOGRAPH n. a photograph of a celestial body.
CORTICOTROPHINScorticotrophins n. Plural of corticotrophin.
CORTICOTROPHIN n. a hormone that stimulates the adrenal gland, also CORTICOTROPIN.
MICROPHOTOMETERmicrophotometer n. (Physics) Any of various photometers used either to measure the variation of densities over small areas…
MICROPHOTOMETER n. 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.
MICROPHOTOMETRYmicrophotometry 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.
ORTHOCHROMATISMorthochromatism n. Quality of being orthochromatic.
ORTHOCHROMATISM n. the state of being orthochromatic, of photographic film, sensitive to all colours except red.
PHOTOTRANSISTORphototransistor n. (Electronics) Any semiconductor device whose electrical characteristics are light-sensitive.
PHOTOTRANSISTOR n. a junction transistor, whose base signal is generated by illumination of the base.
PROTHONOTARIATSprothonotariats n. Plural of prothonotariat.
PROTHONOTARIAT n. the college constituted by the twelve apostolical prothonotaries (bishops and senior members of the curia) in Rome, also PROTONOTARIAT.
PROTOHISTORIANSprotohistorians n. Plural of protohistorian.
PROTOHISTORIAN n. one who studies protohistory.
PYROPHOTOMETERSPYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits.
TRIBROMOETHANOLtribromoethanol n. An anaesthetic now mainly used in laboratory animals.
TRIBROMOETHANOL n. a soluble white crystalline compound with a slight aromatic odour, used as a general anaesthetic.
TROUBLESHOOTERStroubleshooters n. Plural of troubleshooter.
TROUBLESHOOTER n. a skilled worker employed to locate trouble and make repairs in machinery and technical equipment.

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.

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See this list for:

  • English Wiktionary: 111 words
  • Scrabble in French: 11 words
  • Scrabble in Spanish: 3 words
  • Scrabble in Italian: 4 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 12 words


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