plenum

(plēnəm, plenəm)

noun pl. plenums or plena

  1. space filled with matter
  2. fullness
  3. a full or general assembly, as of all members of a legislative body
    1. an enclosed volume of gas under greater pressure than that surrounding the container
    2. the state of this

Origin: ModL < L, neut. of plenus, full

See plenum in American Heritage Dictionary 4

noun pl. ple·nums or ple·na (plēˈnə, plĕnˈə)
  1. An assembly or meeting with all members present.
  2. A condition, space, or enclosure in which air or other gas is at a pressure greater than that of the outside atmosphere.
  3. The condition of being full; fullness.
  4. A space completely filled with matter.

Origin:

Origin: Latin plēnum (spatium), full (space)

Origin: , neuter of plēnus; see pelə-1 in Indo-European roots

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