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There are 16 twelve-letter words containing C, 2O and 2Y

COTYLEDONARYcotyledonary adj. Of or pertaining to a cotyledon.
COTYLEDONARY adj. relating to or having cotyledons, also COTYLEDONOUS.
CRYPTONYMOUScryptonymous adj. Relating to, or published under, a cryptonym.
CRYPTONYMOUS adj. like a cryptonym, a secret name.
CYTOTAXONOMYcytotaxonomy n. (Taxonomy) The classification of organisms based upon their cellular structure and function, and especially…
CYTOTAXONOMY n. the classification of organisms based on cell structure, esp. the number, shape, etc., of the chromosomes.
CYTOTOXICITYcytotoxicity n. (Biology) the property of being toxic to a cell.
CYTOTOXICITY n. the quality of being cytotoxic.
DACTYLIOLOGYdactyliology n. The branch of archaeology dealing with gem engraving.
dactyliology n. The branch of archaeology dealing with finger rings.
DACTYLIOLOGY n. the study of finger-rings.
DACTYLOSCOPYdactyloscopy n. The forensic analysis and comparison of fingerprints as a means of identification of individuals.
DACTYLOSCOPY n. the comparison of fingerprints for purpose of identification.
HYPOCOTYLOUSHYPOCOTYLOUS adj. of or like a hypocotyl, the stem of a plant below the cotyledons.
HYPOCYCLOIDShypocycloids n. Plural of hypocycloid.
HYPOCYCLOID n. a curve generated by a point on the circumference of a circle which rolls on the inside of another circle.
HYPOTONICITYhypotonicity n. The quality of being hypotonic.
HYPOTONICITY n. the state of being hypotonic.
HYSTEROSCOPYhysteroscopy n. (Medicine) The examination of the uterus using a hysteroscope.
LARYNGOSCOPYlaryngoscopy n. The examination of the throat using a laryngoscope.
LARYNGOSCOPY n. examination by use of a laryngoscope.
MYCOTOXOLOGYMYCOTOXOLOGY n. the study of mycotoxins.
MYRMECOCHORYmyrmecochory n. (Biology) The dispersal of seeds, spores, or fruit by ants.
MYRMECOCHORY n. the dispersal of fruits and seeds by ants.
MYXOMYCETOUSmyxomycetous adj. Relating to the fungus class Myxomycetes.
MYXOMYCETOUS adj. of or like a myxomycete, a slime mould.
SYNONYMICONSsynonymicons n. Plural of synonymicon.
SYNONYMICON n. a dictionary of synonyms, a thesaurus.
ZYGOMYCETOUSzygomycetous adj. Of or relating to the zygomycetes.
ZYGOMYCETOUS adj. of or like a zygomycete, one of a group of fungi marked by the production of zygospores.

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: 139 words
  • Scrabble in French: 5 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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