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Cystine

7 lettersnounrare

Updated June 2026

Definition

A crystalline amino acid present in many proteins, particularly keratin, first isolated from bladder stones.

High levels of cystine in the urine can lead to kidney stone formation in people with the inherited condition cystinuria.

Pronunciation

Syllables

cys·tine

Related Words

Synonyms

amino aciddisulphide amino acid

Word Game Tips

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Wordle

Contains Y and ends in INE. The CYST opening is distinctive and shared with words like CYSTIC. No repeated letters.

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Scrabble

Y (4 pts) adds value. Biochemistry term worth knowing for Scrabble. The INE ending hooks to CYSTINES with an S for continued play.

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Shorter words formed from the letters in “cystine”.

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Dictionary References

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