**In*verse"** (?), a. [L. *inversus*, p. p. of *invertere*: cf. F. *inverse*. See Invert.]

**1.**

Opposite in order, relation, or effect; reversed; inverted; reciprocal; -- opposed to *direct*.

**2.** Bot.

Inverted; having a position or mode of attachment the reverse of that which is usual.

**3.** Math.

Opposite in nature and effect; -- said with reference to any two operations, which, when both are performed in succession upon any quantity, reproduce that quantity; as, multiplication is the **inverse** operation to division. The symbol of an inverse operation is the symbol of the direct operation with -1 as an index. Thus sin-1 x means the arc whose sine is x.

Inverse figures Geom., two figures, such that each point of either figure is inverse to a corresponding point in the order figure. -- Inverse points Geom., two points lying on a line drawn from the center of a fixed circle or sphere, and so related that the product of their distances from the center of the circle or sphere is equal to the square of the radius. -- Inverse, ∨ Reciprocal, ratio Math., the ratio of the reciprocals of two quantities. -- Inverse, ∨ Reciprocal, proportion, an equality between a direct ratio and a reciprocal ratio; thus, 4 : 2 : : , or 4 : 2 : : 3 : 6, *inversely**.
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*© Webster 1913.
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***In"verse**, n.

*That which is inverse.*

*Thus the course of human study is the ***inverse** of the course of things in nature.
*Tatham.*

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*© Webster 1913.*