All 15-letter words with as thirteenth letter

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There are 7 fifteen-letter words with X as thirteenth letter

ARCHAEOPTERYXES	• archaeopteryxes n. Plural of archaeopteryx. • ARCHAEOPTERYX n. a Jurassic fossil bird of the Archaeopteryx genus, with a long bony tail, sharp-toothed jaws, and wings bearing three clawed digits.
CEPHALOTHORAXES	• cephalothoraxes n. Plural of cephalothorax. • CEPHALOTHORAX n. the body, or head with thorax, of spiders, crustaceans, etc.
HIERACOSPHINXES	• hieracosphinxes n. Plural of hieracosphinx. • HIERACOSPHINX n. in ancient Egyptian art, a hawk-headed sphinx.
IMMUNOCOMPLEXES	• immunocomplexes n. Plural of immunocomplex. • IMMUNOCOMPLEX n. a complex formed between an antibody and an antigen.
IMPROVISATRIXES	• IMPROVISATRIX n. (archaic) a female improvisator, also IMPROVISATRICE.
INTERLOCUTRIXES	• INTERLOCUTRIX n. a female interlocutor, also INTERLOCUTRESS, INTERLOCUTRICE.
PRIMOGENITRIXES	• PRIMOGENITRIX n. a female ancestor.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.

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