Craticula

Part of speech: noun

Definitions

1. A small, microscopic structure that can serve as a particle in biological contexts
2. Referring to a diminutive or specific component often found in microscopic examination or taxonomy
3. A term that may denote a minute entity, often relating to various fields of scientific study involving tiny organisms or particles

Etymology: The Latin "craticula" was a small gridiron, a diminutive of "crates," meaning a hurdle or wickerwork frame. The same Latin root gave English two everyday words: "grate," a metal lattice, and "crate," a wooden framework for packing. Both come from the idea of interwoven bars or slats. In English, the term is a technical borrowing that shares this sense of a fine grid. Specialists apply it to a small lattice or grid used to organize and measure what is seen under magnification, so that an observer can locate and count features in a field of view. The exact route by which it entered the specialist vocabulary is uncertain, but its meaning follows directly from the Latin image of a small set of crossed bars.