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There are 4 eleven-letter words beginning with PROTHAL

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.

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


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