Definitions

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

  • noun The hard, siliceous bivalve shell of a diatom.

from The Century Dictionary.

  • noun A small fragment.
  • noun The silicious shell of a diatom; a testule.

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

  • noun (Bot.) The siliceous shell of a diatom. It is composed of two valves, one overlapping the other, like a pill box and its cover.

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

  • noun botany The siliceous shell of a diatom.

Etymologies

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

[French, from Latin frūstulum, diminutive of frūstum, piece broken off.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin frustulum, from frustum ("morsel").

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Examples

  • Electrodes were inserted through the frustule into the cytoplasmic rich nuclear region of the cell (photomicrograph inset, scale bar 20 µm).

    PLoS ONE Alerts: New Articles Alison R. Taylor 2009

  • The approximately cyclindical cells (50-70 µm long by 20-40 µM in diameter) were impaled though the silica frustule aided by capacitance over compensation.

    PLoS ONE Alerts: New Articles Alison R. Taylor 2009

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