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sensillum
This term is used exclusively within biological and entomological contexts to describe the microscopic sensory structures of invertebrates. It carries a highly technical register and is rarely encountered outside of academic research or specialized zoological texts.
Because it is derived from Latin, the word follows a non-standard English pluralization pattern. Instead of adding an s, the plural form is sensilla, which is the standard way to refer to these organs in scientific literature.
Meanings
A specialized sensory organ in invertebrates, typically consisting of a single sensory neuron and its associated supporting cells, often projecting through the cuticle as a hair or peg.
The researcher examined the sensillum on the antenna of the insect to determine its response to pheromones.