As a noun matric
is (south africa) the final year of high school.
As an adjective biometric is
of, pertaining to or using biometrics.
(South Africa) The final year of high school.
(South Africa) Someone in their final year of high school.
*1979 , , A Dry White Season , Vintage 1998, p. 37:
*:Once, when some money disappeared […], it was Ben who took the cleaner under his wing and instituted inquiries which revealed a group of matric boys to be the culprits.
Of, pertaining to or using biometrics