X

X

X¹ [eks]

n.

1. a mark shaped like an X used:

a) to represent the signature of a person who cannot write

b) to indicate a particular point on a map, diagram, etc.

c) as a symbol for a kiss in letters, etc.

d) to indicate the degree of fineness of flour, sugar, etc.

2. the Roman numeral 10: with a superior bar (X̄), 10,000: XX = 20, XXX = 30, and X before another Roman numeral expresses a number 10 less than that numeral (XC = 90)

3. a person or thing unknown or unrevealed

☆ 4. a film rating meaning that no one under the age of seventeen is to be admitted

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X's and O's

☆ Informal the basic elements of a specified field of work, knowledge, etc.; often, specif., the plays and strategies used in a particular sport

X²

abbrev.

1. [see XP] Christ: used also in combination, as in Xmas

2. extra

X³

symbol

Elec. reactance