PC Scientific & Educational Abbreviation

Precast Concrete

Concrete components made in a factory or yard and transported to the site. Concrete beams, columns, lintels, piles, manholes, and parts of walls and floors which are cast and partly matured on the site or in a factory before being placed in their final position in a structure. Where many of the same unit are required, precasting may be more economical than casting in place, may give a better surface finish, reduce shrinkage of the concrete on the site and make stronger concrete.

Polycarbonate

Polycarbonate, known by the trademarked names Lexan, Makrolon, Makroclear, arco and others, are a particular group of thermoplastic polymers. They are easily worked, molded, and thermoformed. Because of these properties, polycarbonates find many applications.

Pacific Coast Railroad

Proper Conjugate

Planetary Contrast

Planetary Camera

propylene carbonate

Pocket Computer

Primitive Cell

Placebo-controlled

A term used to describe a method of research in which an inactive substance (a placebo) is given to one group of participants, while the treatment (usually a drug or vaccine) being tested is given to another group. The results obtained in the two groups are then compared to see if the investigational treatment is more effective than the placebo.