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pilus
This term is primarily used in microbiology and anatomy to describe hair-like projections. In a bacterial context, it refers to specialized protein tubes used for adhesion or conjugation, where genetic material is exchanged between cells. This technical usage is distinct from the general anatomical sense referring to a single hair.
Because the word is derived from Latin, it follows an irregular pluralization pattern. Instead of adding a standard English suffix, the plural form changes the ending to -i, which is common for biological and medical terminology of Latin origin.
Meanings
A hair-like appendage found on the surface of many types of bacteria, used for attachment to surfaces or for the transfer of genetic material between bacterial cells.
A hair-like structure or a single hair in an anatomical or biological context.
The microscopic examination revealed a single pilus protruding from the epidermal layer.
Examples
The bacteria use a specialized pilus to transfer DNA to another cell.
Look at the screen and identify the pilus extending from the cell wall.
A single pilus can act as a bridge between two prokaryotic organisms.
The pathogen attaches to the host tissue via a surface pilus.
I wonder if this specific strain of bacteria lacks a pilus for conjugation.
The electron microscope clearly shows the thin pilus protruding from the membrane.
Without a functional pilus, the bacteria cannot adhere to the mucosal surface.
The researcher noted that the length of the pilus varied between samples.
Is the pilus responsible for the initial attachment phase of the infection?
Is the pilus responsible for the initial attachment phase of the infection?