Decayed or brittle wood at the center of a log.

Said of a fracture that takes place with no prior ductile deformation.

1. Descriptive of a material which fractures under low stress without appreciable deformation. 2. Descriptive of a paint film unable

The amount of heat required to raise the temperature of 1 pound of water by 1 degree Fahrenheit. Abbr. Btu.

An independent British organization, which operates under government sanction, for testing, assessing, and issuing certificates concerning the performance of new