preimplantation genetic testing
post graduate year
Optics. 1. phot; phots. Chemistry. 1. the symbol for the logarithm of the reciprocal of hydrogen ion concentration in gram atoms per liter, used to express the acidity or alkalinity of a solution on a scale of 0 to 14, where less than 7 represents acidity, 7 neutrality, and more than 7 alkalinity. Chemistry. 1. […]
1. Public Health. 1. postage and handling.
1. Public Housing Administration. PHA abbr. phytohemagglutinin 1. potentially hazardous asteroid 2. Public Housing Administration 3. Public Housing Authority