(linear algebra) Said of a real, square matrix: that the product of it with a column vector on its right side and the transpose of that column vector on its left side is greater or equal to zero, only equaling zero if the vector itself is zero.

Sharing the same or similar position; similarly positioned.

Synonym of reverse discrimination / Synonym of affirmative action

(aviation) The air traffic control practice of controlling aircraft whose positions are determined by direct radar observation.

(sociology) A form of affirmative action that attempts to assist members of an underrepresented group without prejudicing the criteria of selection by merit.

(epidemiology) The percentage of people who have tested positive out of all of those who have been tested (for a given pathogen).

Abbreviation of Rhesus positive.

A more specific term for Rhesus positive.

(of blood or of a person) Having the RhD antigen present in red blood cells.

A strategic posture that is advantageous.