egression

1. (physics) A calculated version of the wave field that emanated from a specified location at a specified time.Examples: "The egression (H₊) is simply the time reverse of Equation (1)."; "Similarly applied to the acoustic egression, <[H₊(r,t)]²>, the result is an "egression-power map"."; "The difference between the egression power plots representing the acoustic glory and those representing the quiet Sun are fairly conspicuous."

2. (paleobiology) The location of a feature on an ammonite fossil outward from the line of the shell's spiral.Examples: "The reason for this lies in the fact that a wide-shell-band, running along the margin of the egression, is superposed directly upon the shell of the preceding whorl."; "According to Klinger and Kennedy (1989), the hoplitoidean Placenticeras kaffarium displays a rather strong umbilical egression, which gives it a scaphitoid adult morphology."; "Egression of the umbilical suture line on the last whorl of an adult and complete speciment is one morphologic feature which is unambiguous evidence of maturity in ammonites."

3. (sociology, systems theory) A centralized or top-down organization.Examples: "Experience and the will of one person were becoming an increasingly more determining moment in the practice of the entire collective: a stable egression was developing."; "The most obvious example of egression was the relationship of the brain to the sensory organs and other nerve centres of the body."; "In machine production a new link of egression –a mechanism –is introduced between the hand of man and the working tool. Thus, a new broadening of egression is also achieved, and quite a significant one at that: the mechanism is free from the biological limitation of organs of the body and can control at the same time an indefinitely large number of instruments."

4. (law) A legitimate implication an existing law.Examples: "This conclusion is an egression from federalism principles."; "The tenet, accordingly, has some claim to stand as an egression of "natural" right, even when "natural" is taken in an evolutionary sense."