What is the definition of Cardinal point? | Dictionary.net

CARDINAL POINT

\kˈɑːdɪnə͡l pˈɔ͡ɪnt], \kˈɑːdɪnə‍l pˈɔ‍ɪnt], \k_ˈɑː_d_ɪ_n_əl p_ˈɔɪ_n_t]\

Definitions of CARDINAL POINT

1898 - American pocket medical dictionary
1916 - Appleton's medical dictionary

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any one of a set of six points of reference in the eye, or of four in pelvic inlet.

1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland

Six point which determine the direction of the rays emerging from and entering a series of refracting media (e. g., the eye). See principal p's, focal p's, and nodal p's.

1916 - Appleton's medical dictionary
By Smith Ely Jelliffe

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