Xis definitions

Xis

1) Before omicrons 2) Certain fraternity letters 3) Followers of nus 4) Frat letters 5) Fraternity letters 6) Greek consonants 7) Greek letters 8) Greek letters after nus 9) Letters after nus 10) Letters before omicrons 11) Letters from frat row 12) Nu followers 13) Numbers or letters 14) Omicron preceders
Found on https://www.crosswordclues.com/clue/xis

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Xis

The 'tic tac' term for 6/1.
Found on http://www.horse-directory.co.uk/racingglossary.htm

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XIS

X-ray imaging spectrometer, an instrument on the on the Suzaku space telescope
Found on http://www.translationdirectory.com/glossaries/glossary142.htm

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