X

Primary Meanings of X

1.
n
the cardinal number that is the sum of nine and one; the base of the decimal system
2.
n
the 24th letter of the Roman alphabet
3.
n
street names for methylenedioxymethamphetamine
Full Definitions of X
1

n the cardinal number that is the sum of nine and one; the base of the decimal system

Synonyms:
10, decade, ten, tenner
Type of:
large integer
an integer equal to or greater than ten
2

n the 24th letter of the Roman alphabet

Synonyms:
ex, x
Type of:
alphabetic character, letter, letter of the alphabet
the conventional characters of the alphabet used to represent speech
3

n street names for methylenedioxymethamphetamine

Type of:
MDMA, methylenedioxymethamphetamine
a stimulant drug that is chemically related to mescaline and amphetamine and is used illicitly for its euphoric and hallucinogenic effects; it was formerly used in psychotherapy but in 1985 it was declared illegal in the United States

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