plural of inverted exclamation point

The punctuation mark "¿", which is placed at the beginning of questions in Spanish and, less commonly, Catalan.

(Canada, US) The punctuation mark "¡", which is placed at the beginning of exclamations in Spanish.

plural of inverted question mark

An equal mixture of glucose and fructose formed by the enzymatic hydrolysis of sucrose; it is found in honey and some fruits, and also produced industrially.

(linear algebra) Any n×n square matrix for which there exists a corresponding inverse matrix (i.e., a second (or possibly the same) matrix such that when the two are multiplied by each other, in either order, the result is the n×n identity matrix).

(electrical engineering) A device that converts direct current electricity to alternating current electricity.

(electronics) An electronic logic circuit which inverts the phase of a signal

An electronic circuit which changes the phase of a signal by 180°; used in the input stage of a push-pull amplifier.

plural of power inverter