Mononuclears

Part of speech: noun

Definitions

1. A type of white blood cell characterized by a single nucleus, which plays a critical role in the immune response
2. Cells that contain one nucleus and are involved in the body's defense mechanisms against pathogens
3. Immune cells with a single nucleated structure that are essential for identifying and fighting infections

Etymology: "Mononuclears" is simply the plural of "mononuclear", so the word is built from two familiar parts. The first, "mono-", comes from the Ancient Greek "monos", meaning "single" or "alone", which also gave English words such as "monologue" and "monarch". The second part, "nuclear", comes from "nucleus", the Latin word for a kernel or core, and in English it describes the central part of something. Put together, "mononuclear" describes a cell whose nucleus is a single one, as opposed to cells with several nuclei. The plural form therefore refers to a class of blood cells, such as lymphocytes and monocytes, that each contain one nucleus. The modern scientific vocabulary behind it was coined from classical roots rather than being used by ancient writers.