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In psychology, rigidity, or mental rigidity, refers to an obstinate inability to yield or a refusal to appreciate another person's viewpoint or emotions and the tendency to perseverate, which is the inability to change habits and modify concepts and attitudes once developed.
Rigid body, in physics, a simplification of the concept of an object to allow for modelling; Rigid transformation, in mathematics, a rigid transformation preserves distances between every pair of points; Rigidity (chemistry), the tendency of a substance to retain/maintain their shape when subjected to outside force
In materials science, hardness (antonym: softness) is a measure of the resistance to localized plastic deformation, such as an indentation (over an area) or a scratch (linear), induced mechanically either by pressing or abrasion.
Symptoms associated with central nervous systems disorders are classified into positive and negative categories. Positive symptoms include those that increase muscle activity through hyper-excitability of the stretch reflex (i.e., rigidity and spasticity) where negative symptoms include those of insufficient muscle activity (i.e. weakness) and reduced motor function. [5]
Cadaveric spasm, also known as postmortem spasm, instantaneous rigor mortis, cataleptic rigidity, or instantaneous rigidity, is a rare form of muscular stiffening that occurs at the moment of death and persists into the period of rigor mortis. [1]
Hunter Gaddis moved to the bullpen full time this spring, and the early results have been nothing but positive. And his velocity? It's way up.
The "could" here is important to note: rigid designation is a property of the way terms are used, not a property of the terms themselves, and some philosophers, following Keith Donnellan, have argued that a phrase such as "the first Chancellor of the German Empire" could be used rigidly, in sentences such as "the first Chancellor of the German ...
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