| ABS | (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium |
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| ABS | the process of absorbing nutrients into the body after digestion |
| ABS | the social process of absorbing one cultural group into harmony with another |
| ABS | a dark band in the spectrum of white light that has been transmitted through a substance that exhibits absorption at selective wavelengths |
| ABS | a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance |
| ABS | (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body |
| ABS | an indicator used in reactions that involve precipitation |
| ABS | the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths |
| ABS | a unit for measuring absorption |
| ABS | having power or capacity or tendency to absorb or soak up (liquids) |
| ABS | (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body |
| ABS | run away |