absorption - Loss or dissipation of energy as it travels through a medium, Example: radio waves lose some of their energy as they travel through the atmosphere. avionics - Aviation electronics. bipolarjunction transistor - (BJT), A three terminal device in which emitter to collector current is controlled by base current. calibration - To adjust the correct value of a reading by comparison to a standard. common-mode rejection ratio - (CMRR) The ratio of op-amp differential gain to common-mode gain. A measure of an op-amp's ability to reject common-mode signals such as noise.