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According to norms or rules or to a regular pattern.
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Usual, healthy; not sick or ill or unlike oneself.
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(education, of a school) Teaching teachers how to teach; teaching teachers the norms of education.
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(chemistry) Of, relating to, or being a solution containing one equivalent weight of solute per litre of solution.
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(organic chemistry) Describing a straight chain isomer of an aliphatic hydrocarbon, or an aliphatic compound in which a substituent is in the 1- position of such a hydrocarbon.
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(physics, of a mode in an oscillating system) In which all parts of an object vibrate at the same frequency (a normal mode).
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(rail transport, of points) In the default position, set for the most frequently used route.
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(geometry) Perpendicular to a tangent of a curve or tangent plane of a surface.