(chemistry, dated, deprecated by IUPAC) A form of isomerism in which, in one isomer two atoms or groups are on the same side of the plane of a double bond or ring, whereas in the other isomer they are on opposite sides; these are cis- and trans- isomers, respectively.

(mathematics) A measure of central tendency of a set of n values computed by extracting the nth root of the product of the values.

(mathematical analysis) Any infinite series whose terms are in geometric progression; any series of the form a+ar+ar²+ar³⋯=a∑ᵢ₌₀ ᪲rⁱ.

plural of geometric isomer

A measure of five feet.

A portable instrument in the form of a square frame for ascertaining distances and heights by measuring angles.

An instrument for engraving banknotes, etc., with complicated patterns of interlacing lines.

An instrument for drawing geometric curves, in which the movements of a pen or pencil attached to a revolving arm of adjustable length may be indefinitely varied by changing the toothed wheels which give motion to the arm.

plural of geometric progression

(linear algebra) The dimension of the eigenspace of a given eigenvalue (of a given square matrix).