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Definition of X
1. Noun. The cardinal number that is the sum of nine and one; the base of the decimal system.
2. Adjective. Being one more than nine.
3. Noun. The 24th letter of the Roman alphabet.
Exact synonyms: Ex
Group relationships: Latin Alphabet, Roman Alphabet
Generic synonyms: Alphabetic Character, Letter, Letter Of The Alphabet
Group relationships: Latin Alphabet, Roman Alphabet
Generic synonyms: Alphabetic Character, Letter, Letter Of The Alphabet
4. Noun. Street names for methylenedioxymethamphetamine.
Exact synonyms: Adam, Cristal, Disco Biscuit, Ecstasy, Go, Hug Drug, Xtc
Generic synonyms: Mdma, Methylenedioxymethamphetamine
Generic synonyms: Mdma, Methylenedioxymethamphetamine
Medical Definition of X
1. Although the letter X is used as a symbol in various ways (such as X-rays, the x-axis of a graph, etc.), today the x usually refers to the x chromosome. (12 Dec 1998)