Oestrogen

Part of speech: noun

Definitions

1. A hormone crucial for the development of female traits, it plays a vital role in regulating reproductive functions and the menstrual cycle while also affecting mood and bone density
2. This substance is essential for female sexual development, regulates menstrual cycles and reproduction, and also impacts mood and bone strength
3. A key hormone involved in female development, it regulates reproductive health and menstrual cycles while also influencing mood and maintaining bone density

Etymology: Ancient Greeks used "oîstros" for a gadfly, the insect that torments cattle, and also for a frenzy or sudden impulse, as if the animal had been stung into madness. That sense of driven, uncontrollable urge is what the modern word carries into biology. The Romans borrowed it as "oestrus," which came to mean the heat or rutting period of animals, when the female is driven to mate. English took the Latin term as "estrus," and the hormone name was built from it. "Estrogen" combines the stem "estro-" with "-gen," from Greek "-genes," meaning producing or generating something. So an estrogen is literally a producer of estrus, the substance that drives the heat cycle. The "-gen" element appears in other scientific coinages such as "oxygen" and "hydrogen," which likewise name something by what it generates.

Synonyms: estrogen