Abnormal wood formed on the underside of branches and leaning trunks of softwoods; usually lower in strength; has unusual shrinkage

A valve in which water flow is shut off by a flat disk that is screwed down onto its seat.

The permanent deformation of an elastomeric sealant, compressed so far that its internal structure is partially or completely destroyed and

A material which provides a seal as a result of pressure between the faces of a joint.

Structural reinforcement which is designed to carry compressive stresses.

A technique of thermoset molding; a molding compound is placed in a polished steel mold, and then heat and pressure

Any member in which the primary stress is longitudinal compression.