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There are 8 eleven-letter words containing PROTH

PROTHALAMIAprothalamia n. Plural of prothalamion.
prothalamia n. Plural of prothalamium.
PROTHALAMIUM n. (Spenser) a song in honour of a marriage, also PROTHALAMION.
PROTHALLIALPROTHALLIAL adj. of or like the prothallium, the growth following a germinating spore, for the purpose of sexual reproduction, producing the antheridia and archegonia.
PROTHALLIUMprothallium n. A plant, usually a pteridophyte, in gametophyte stage in the metagenesis cycle.
prothallium n. The young gametophyte of a liverwort or peat moss.
PROTHALLIUM n. the free-living gametophyte of a fern or other vascular cryptogam, also PROTHALLUS.
PROTHALLOIDPROTHALLOID adj. relating to the prothallus, the gametophyte or sexual generation in ferns and related plants.
PROTHORACESprothoraces n. Plural of prothorax.
PROTHORAX n. the first or anterior segment of the thorax in insects.
PROTHORACICprothoracic adj. Of or pertaining to the prothorax.
PROTHORACIC adj. of or relating to the prothorax.
PROTHORAXESprothoraxes n. Plural of prothorax.
PROTHORAX n. the first or anterior segment of the thorax in insects.
PROTHROMBINprothrombin n. (Biochemistry) A glycoprotein, produced in the liver, that is converted into thrombin during bleeding…
PROTHROMBIN n. a protein-like substance present in blood plasma.

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 WikWik.org and 1Word.ws.

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See this list for:

  • English Wiktionary: 16 words
  • Scrabble in French: 2 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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