Related Words

Selection Pressure: A measure of the effectiveness of natural selection in altering the genetic composition of a population. See also natural selection.

Natural Selection: The process of differential survival and reproduction of fitter genotypes; can be stabilizing, directional, or disruptive. Better adapted individuals are more likely to survive to reproducti . . . View Full Definition

Pressureless Ball: A special type of tennis ball that does not have a core of pressurized air as standard balls do but rather has a core made of solid rubber, or a core filled tightly with micro-particles. Qua . . . View Full Definition

Pressured Speech: Speech that is increased in amount, accelerated, and difficult or impossible to interrupt. Usually it is also loud and emphatic. Frequently the person talks without any social stimulation an . . . View Full Definition

Process Acupressure: This integrated therapy combines traditional acupressure with Zero Balancing techniques and psychological processing to enhance psycho-spiritual growth. Process acupressure offers a hands-on . . . View Full Definition

Sea Level Pressure: The atmospheric pressure at mean sea level, usually determined from the observed station pressure.

Selection: A change in allele frequency over time in a population

Security Selection Decision: Choosing the particular stocks or bonds or other investment instruments to include in a portfolio.

Pressure-Treated Wood: Lumber that has been saturated with a preservative.

Pressure Transducer: Outputs electrical signal proportional to pressure.