Word Meanings - PERTURBATIONAL - Book Publishers vocabulary database

Of or pertaining to perturbation, esp. to the perturbations of the planets. "The perturbational theory." Sir J. Herschel.

Related words: (words related to PERTURBATIONAL)

• HERSCHELIAN
  Of or relating to Sir William Herschel; as, the Herschelian telescope.
• HERSCHEL
  See URANUS
• PERTURBATION
  A disturbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other. Newcomb. (more
• PERTAIN
  stretch out, reach, pertain; per + tenere to hold, keep. See Per-, 1. To belong; to have connection with, or dependence on, something, as an appurtenance, attribute, etc.; to appertain; as, saltness pertains to the ocean; flowers pertain to plant
• THEORY
  1. A doctrine, or scheme of things, which terminates in speculation or contemplation, without a view to practice; hypothesis; speculation. Note: "This word is employed by English writers in a very loose and improper sense. It is with them usually
• PERTURBATIONAL
  Of or pertaining to perturbation, esp. to the perturbations of the planets. "The perturbational theory." Sir J. Herschel.
• VORTEX THEORY
  The theory, advanced by Thomson on the basis of investigation by Helmholtz, that the atoms are vortically moving ring-shaped masses (or masses of other forms having a similar internal motion) of a homogeneous, incompressible, frictionless fluid.
• DINGDONG THEORY
  The theory which maintains that the primitive elements of language are reflex expressions induced by sensory impressions; that is, as stated by Max Müller, the creative faculty gave to each general conception as it thrilled for the first
• GERM THEORY
  The theory that living organisms can be produced only by the development of living germs. Cf. Biogenesis, Abiogenesis. 2. The theory which attributes contagious and infectious diseases, suppurative lesions, etc., to the agency of germs.
• SIDE-CHAIN THEORY
  A theory proposed by Ehrlich as a chemical explanation of immunity phenomena. In brief outline it is as follows: Animal cells and bacteria are complex aggregations of molecules, which are themselves complex. Complex molecules react with one another
• IMPERTURBATION
  Freedom from agitation of mind; calmness; quietude. W. Montagu.
• FERMENTATION THEORY
  The theory which likens the course of certain diseases (esp. infectious diseases) to the process of fermentation, and attributes them to the organized ferments in the body. It does not differ materially from the accepted germ theory .
• APPERTAIN
  To belong or pertain, whether by right, nature, appointment, or custom; to relate. Things appertaining to this life. Hooker. Give it unto him to whom it appertaineth. Lev. vi. 5. (more info) appartenir, fr. L. appertinere; ad + pertinere to reach