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There are 12 thirteen-letter words containing L, N, 3O, P, R and T

ISOPROTERENOLisoproterenol n. (Pharmacology) Synonym of isoprenaline.
ISOPROTERENOL n. a sympathomimetic agent used in the treatment of asthma.
PHOTOELECTRONphotoelectron n. (Physics) An electron ejected from the surface of a material by the photoelectric effect.
PHOTOELECTRON n. an electron released from a surface by a photon.
POLTROONERIESpoltrooneries n. Plural of poltroonery.
POLTROONERY n. mean pusillanimity, cowardice.
POLYPROTODONTpolyprotodont n. Any marsupial of the order Polyprotodontia.
POLYPROTODONT n. any member of the Polyprotodontia, the suborder of marsupials, including opossums, dasyures, etc., with many small incisors.
PROLONGATIONSprolongations n. Plural of prolongation.
PROLONGATION n. the act of prolonging.
PROPORTIONALSproportionals n. Plural of proportional.
PROPORTIONAL n. a number or quantity in a proportion.
PROPOSITIONALpropositional adj. Relating to, or limited to, propositions.
PROPOSITIONAL adj. of the nature of a proposition.
PROTANOMALOUSprotanomalous adj. Having or relating to protanomaly.
PROTANOMALOUS adj. afflicted with protanomaly, a form of colour blindness in which there is a decreased response to red.
PROTOCOLISINGprotocolising v. Present participle of protocolise.
PROTOCOLISE v. to make a protocol of, also PROTOCOLIZE.
PROTOCOLIZINGprotocolizing v. Present participle of protocolize.
PROTOCOLIZE v. to make a protocol of, also PROTOCOLISE.
PROTONOTARIALPROTONOTARIAL adj. of or like a protonotary, a principle law clerk in certain courts of law.
TROPOCOLLAGENtropocollagen n. (Biochemistry) A component of fibres of collagen in which three polypeptide chains are coiled around each other.
TROPOCOLLAGEN n. a subunit of collagen fibrils consisting of three polypeptide strands arranged in a helix.

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: 60 words
  • Scrabble in French: 20 words
  • Scrabble in Spanish: 13 words
  • Scrabble in Italian: 46 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 117 words


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