Definition

A recurring period of sexual receptivity and fertility in female mammals, often referred to as heat.

Example

The female dog is in oestrus and is ready to mate.

Conversation

Did you know that some animals go through oestrus cycles every year?

Really? I had no idea it was such a regular thing for them.

Yeah, it helps them with reproduction and mating.

That makes sense! Nature has some interesting ways of ensuring survival.

Synonyms & Antonyms

Root Explanation

Oestrus comes from the Greek word "oistros" (meaning frenzy or passion). The term originally referred to a state of intense sexual desire or excitement, particularly in animals during mating season.

Memory Tip

Imagine a strong 'frenzy' or 'passion' that animals feel during mating — that's what oestrus describes.

Visually Confused Words