Torticollis is a problem involving the muscles of the neck that causes the head to tilt down. The term comes from two Latin words: tortus, which means twisted, and collum, which means neck. If your baby has the condition at birth, itâs called congenital muscular torticollis. Thatâs the most common type.
Definition of additive inverse. : a number that when added to a given number gives zero the additive inverse of 4 is â4 â compare opposite 3.
To invert a number in arithmetic usually means to take its reciprocal. A closely related idea in geometry is that of inverting a point. In the plane, the inverse of a point P with respect to a reference circle (Ã¸) with center O and radius r is a point P', lying on the ray from O through P such that. This is called circle inversion or plane inversion.