The term 'cosine reciprocals' is also known as secants, which is a seven-letter word. Secants are the reciprocal of the cosine function, which is a trigonometric function that is used to measure angles in a right triangle. The cosine of an angle is equal to the ratio of the length of the adjacent side to the length of the hypotenuse. The secant of an angle is equal to the ratio of the length of the opposite side to the length of the hypotenuse.