ordinate

IPA/ˈɔːdɪnət/
IPA/ˈɔːrdɪnət/

ordinate — noun

  • ordinatesingular
  • ordinatesplural

1. in a coordinate system such as a graph, the value on the vertical (y) axis that

1.名詞C1
釋義

in a coordinate system such as a graph, the value on the vertical (y) axis that fixes a point's up-down position, usually written as the second element of an ordered pair like (x, y).

例句

To plot point (7, 5), Rodrigo counted 5 units up the y-axis for the ordinate.

the ordinate of (x, y) pair — second element is the y-value

A point below the x-axis has a negative ordinate, such as -3.

ordinate + negative value for points below x-axis

同義詞
  • y-coordinate

    more common in spoken maths; less formal

  • y-value

    simpler and used in basic arithmetic contexts

反義詞
  • abscissa

    the first number in the pair (x-coordinate); ordinate is the vertical, abscissa is the horizontal

文法句型

the ordinate of [point/number]

ordinates of [points]

用法筆記

Often used in contrast with "abscissa" (the x-coordinate). In everyday classroom language, most people simply say "y-coordinate" or "y-value".

常見錯誤

❌The ordinate of (3, 5) is 3.
✅The ordinate of (3, 5) is 5.
💡the ordinate is the second (y) value, not the first (x) value.
❌Find the ordinate on the horizontal axis.
✅Find the ordinate on the vertical (y) axis.
💡the ordinate measures the vertical, not the horizontal, position.