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pellicle
This term describes a delicate, film-like boundary that separates a biological entity or a liquid surface from its environment. It carries a clinical and scientific connotation, evoking images of transparency, fragility, and protective layering. In microbiology and fermentation, it specifically refers to the organic mat created by aerobic organisms, distinguishing it from a simple chemical scum or a thick crust.
Because it refers to a specific anatomical or chemical structure, the word is used almost exclusively in technical contexts such as botany, zoology, or food science. It is not used in casual conversation to describe general films or skins unless the speaker is intentionally employing precise scientific terminology.
Ý nghĩa
A thin skin, membrane, or film formed on the surface of a liquid, especially one produced by bacteria or yeast during fermentation.
Ví dụ
A thick pellicle had formed on the surface of the fermenting kombucha.
Look at how the euglena changes shape thanks to its flexible pellicle.
The biologist noted a thin pellicle covering the organ sample.
Is that a pellicle on top of the broth or just oil?
The pellicle protects the cell from bursting while allowing it to move.
I wonder if this pellicle is a sign of contamination in the culture.
The specimen exhibited a translucent pellicle under the microscope.
The specimen exhibited a translucent pellicle under the microscope.
Carefully remove the pellicle before pouring the liquid into the bottle.
The structural integrity of the organism depends on its proteinaceous pellicle.
The structural integrity of the organism depends on its proteinaceous pellicle.