What is rigid?

  • (adj): Incapable of or resistant to bending.
    Example: "A rigid strip of metal"; "a table made of rigid plastic"
    Synonyms: stiff
    See also — Additional definitions below

Some articles on rigid:

Laman Graph - Rigidity
... A graph is rigid in this sense if and only if it has a Laman subgraph that spans all of its vertices ... Thus, the Laman graphs are exactly the minimally rigid graphs, and they form the bases of the two-dimensional rigidity matroids ... freedom in their placement (each point has two independent coordinates), but a rigid graph has only three degrees of freedom (the position of a single one of its vertices and the rotation of the ...
Lebaudy Patrie - Development
... Semi-rigid airships were considered more suitable for military use because, unlike rigid airships, they could be deflated, stored and transported by land or by sea ... The Patrie was a semi-rigid airship manufactured by the French sugar magnates Paul and Pierre Lebaudy and designed by their chief engineer, Henri Julliot ...
Spatial Acceleration
... In physics the study of rigid body motion provides for several ways of defining the acceleration state of a rigid body ... of acceleration entails following a single particle/point along the rigid body and observing its changes of velocity ...
Rigid Gas Permeable
... Rigid gas permeable lenses are rigid contact lenses made of oxygen-permeable polymers ... Rigid lenses are able to replace the natural shape of the cornea with a new refracting surface ... This means that a regular (spherical) rigid contact lens can provide good level of vision in people who have astigmatism or distorted corneal shapes ...
Semi-rigid Airship - History
... In the first decade of the twentieth century, semi-rigid airships were considered more suitable for military use because, unlike rigid airships, they could be deflated ... Non-rigid airships had a limited lifting capacity due to the strength limitations of the envelope and rigging materials then in use ... It had a rigid keel under the envelope ...

More definitions of "rigid":

  • (adj): Incapable of compromise or flexibility.
    Synonyms: strict
  • (adj): Incapable of adapting or changing to meet circumstances.
    Example: "A rigid disciplinarian"
    Synonyms: inflexible, unbending
  • (adj): Fixed and unmoving.
    Example: "A face rigid with pain"
    Synonyms: fixed, set
  • (adj): Designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure.

Famous quotes containing the word rigid:

    Let’s call something a rigid designator if in every possible world it designates the same object, a non-rigid or accidental designator if that is not the case. Of course we don’t require that the objects exist in all possible worlds.... When we think of a property as essential to an object we usually mean that it is true of that object in any case where it would have existed. A rigid designator of a necessary existent can be called strongly rigid.
    Saul Kripke (b. 1940)

    I found a dimpled spider, fat and white,
    On a white heal-all, holding up a moth
    Like a white piece of rigid satin cloth—
    Assorted characters of death and blight
    Robert Frost (1874–1963)

    It’s fairly obvious that American education is a cultural flop. Americans are not a well-educated people culturally, and their vocational education often has to be learned all over again after they leave school and college. On the other hand, they have open quick minds and if their education has little sharp positive value, it has not the stultifying effects of a more rigid training.
    Raymond Chandler (1888–1959)