(information science) An indexing algorithm which indexes a document based on the keywords being searched for.

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

(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).

invert sugar

A pentagram with the odd point directed downward; a religious symbol of Baphomet and Satanism.

plural of inverted caret

A caret (^) that has been inverted. / (now only informally) A háček.

plural of inverted comma

A system in which democracy is corrupted and subverted by corporations and politics is trumped by economics.

(phonology, now disused) A dipping tone. / (typography) Any diacritic obtained by rotating a circumflex (ˆ) 180°. / (now only informally) A háček.