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x

x

5.8
A Roman symbol for ten used to show the number ten in names or lists
  • adjective
translation icon : X
  • The Olympics held in Los Angeles were officially known as the X Olympiad.

Examples

  • In ancient Rome, X represented the number ten in their numeral system.

  • The x in the list indicates the tenth item out of twenty.

  • She received the X prize for her outstanding achievement in science.

  • The xth anniversary of the event was celebrated with great enthusiasm.

  • There are x items on the list.

  • The answer is x.

  • As they counted down the years, they celebrated every xth decade as a milestone.

Synonyms

ten
vsx
1.0

The number after nine and before eleven

is the Roman numeral symbol used to indicate that number in enumerations

Compounds

X-ray machine
  • Specialized
12 3.3

A machine that uses X rays to take pictures of the inside of the body or of bags

5 3.6

People born between the early 1960s and the late 1970s who come after the baby boomers

Gen X
  • US
4 3.9

People born between the mid-1960s and early 1980s, often in the United States and Canada

X chromosome
  • Specialized
2 3.9

A cell part that carries genes, present once in males and twice in females and affecting traits related to sex

X-ray film
  • Specialized
1 3.0

Special film that records pictures made by X-rays to show bones or the inside of objects

X-ray picture
  • Specialized
1 3.0

A picture made with X rays that shows the inside of the body

X-ray diffraction
  • Specialized
1 7.1

A way X-rays scatter from the atoms in a crystal to show its structure

factor X
  • Specialized
7.4

A blood protein that helps form a clot to stop bleeding

regression of y on x
  • Specialized
8.7

A method that predicts the value of y from x using numbers

A way a strong gene on the X chromosome causes a trait in children who inherit it

X-linked gene
  • Specialized
7.1

A gene on the X chromosome that causes traits or disorders passed on by that chromosome

A pattern where a gene on the X chromosome causes males to have a trait and females to be carriers

X-linked SCID
  • Specialized
9.6

Serious immune disease in boys caused by a gene change on the X chromosome that prevents T cells from developing

X-radiation
  • Specialized
5.0

High-energy rays used to make images inside the body

X-OR circuit
  • Specialized
7.8

A circuit that sends a signal when two inputs are different

X-ray photograph
  • Specialized
3.7

A picture of the inside of the body made with X-rays

X-ray photography
  • Specialized
3.8

A way to take pictures of the inside of the body using X-rays

X-ray therapy
  • Specialized
3.6

A medical treatment that uses X-rays to kill cancer cells

X-ray tube
  • Specialized
4.0

A tube with no air that makes X rays when fast electrons hit metal

X-SCID
  • Specialized
9.9

A serious inherited disease in baby boys that stops their immune system working

X-tail
  • Specialized
9.8

A tail design for an aircraft with four moving parts in an X shape that help control its direction

Surface Forms

x positive

Etymology

X was used by the Romans to mean 'ten' in their number system, where I is 'one' and V is 'five'. So, X still shows the number ten today, as in anniversaries or the name of an Olympiad.