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Related to frustule: diatom


 (frŭs′cho͞ol, -tyo͞ol)
The hard, siliceous bivalve shell of a diatom.

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


(Botany) botany the hard siliceous cell wall of a diatom
[C19: from French, from Late Latin frustulum a small piece, from frustum a bit]


(ˈfrʌs tʃul)

the shell of a diatom.
[1855–60; < French < Late Latin]
References in periodicals archive ?
The cylindrical cells of these organisms are linked together to form long filaments that exhibit high sedimentation rate due to the frustule which is denser than the surrounding water (Wolin and Duthie, 1999).
A guide to the morphology of the diatom frustule with a key to the British freshwater genera.
Cell solitary frustule twisted along the apical axis, panduriform; keeled raphe in each valve; plastids two and large.
Natural counting units were defined as one unit for each colony, filament, diatom frustule (regardless if colonial or filamentous) or unicellular algae.
Ultrastructure of the frustule of Urosolenia species from the colombian and peruvian amazon: U.
Features Observed Weber (1970) Chloroplast 1-2 several Frustule diameter ([micro]m) 3-4,5 3-4 Pervalvar axis ([micro]m) 6-10 4-8 Areolae in 10 [micro]m 8 - Number of processes 5 -7 5-8 Rimoportula 1 - Features Hasle & Evensen Belcher & Swale (1976) (1978) Chloroplast Frustule diameter ([micro]m) 1-2 (4) 1-2 Pervalvar axis ([micro]m) 3-4 3-4 Areolae in 10 [micro]m - 6-10 Number of processes - 8 Rimoportula 6-8 5-6 1 1
Diatoms are a unique algal group because they are surrounded by a hard, silica-rich shell called a frustule that often has an incredibly intricate and delicate structure.
As has been known for more than two centuries, this covering, or frustule, consists of two halves (the valves), one of which overlaps the other like the lid on a box.
The ability of juvenile abalone to ingest algae depends on the size of the abalone in relation to the algal cell size, the attachment strength of the alga to the substratum, and the strength of the algal cell wall or the outer frustule of diatoms (Kawamura et al.
Diatoms have an external skeleton of silicon dioxide (silica, SiO2) called a frustule, formed of two pieces (theca, plural thecae) that fit together and have small pores on their surface that allow the exchange of substances between the cytoplasm and the exterior.