Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Biology A partition dividing a part or organ; a septum.

from The Century Dictionary.

  • noun In botany: A partition; especially, one of the partitions within ovaries and fruits formed by the coherence of the sides of the constituent carpels. Spurious or false dissepiments are partitions otherwise formed.
  • noun In hymenomycetous fungi, same as trama.
  • noun In zoöl. and anat.: In general, a septum or partition; that which puts asunder two or more things by coming between them: as, the dissepiment of the nostrils.
  • noun Specifically— One of the imperfect horizontal plates which connect the vertical septa in corals, and divide the loculi between the septa into a series of intercommunicating cells. The internal separation or division between the segments of annelids, as worms.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A separating tissue; a partition; a septum.
  • noun (Bot.) One of the partitions which divide a compound ovary into cells.
  • noun (Zoöl.) One of the transverse, calcareous partitions between the radiating septa of a coral.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun botany, zoology partition (in an organ); septum

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin dissaepīmentum, partition, from dissaepīre, to divide : dis-, dis- + saepīre, hedge off (from saepēs, hedge).]

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Examples

  • Now an image is the likeness of a thing either in form or substance, or in both, but not in the sense that the image is a part of or a dissepiment of the original.

    Autobiography, sermons, addresses, and essays of Bishop L. H. Holsey, D. D., 1898

  • You will find nothing but blunder and embarrassment result from any endeavour to enter into further particulars, such as "the relation of the dissepiment with respect to the valves of the capsule," etc., etc., since "in the various species of Veronica almost every kind of dehiscence may be observed" (C. under V. perfoliata, 1936, an

    Proserpina, Volume 2 Studies Of Wayside Flowers John Ruskin 1859

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