© 2026 Sloth Lingo. Learn easy. Lounge wisely.

pyrogen

Intermediate (B1)

IPA: /ˈpaɪrəˌdʒɛn/

KK: /ˈpaɪrəˌdʒɛn/

noun
Definition

A substance that causes an increase in body temperature, leading to fever.


Example

The doctor explained that a pyrogen can trigger a fever in response to infection.


Conversation
Sloth A
I read that some infections can release a pyrogen into the body.
Sloth B
Really? I didn't know that could happen.
Sloth A
Yeah, it can cause a fever as your body fights off the infection.
Sloth B
That makes sense; our bodies are pretty amazing at protecting us!

Synonyms & Antonyms
Synonyms
fever
toxin
antigen
Antonyms
antipyretic
coolant
inhibitor
Root Explanation

Pyrogen → It is formed from "pyro-" (from Greek "pur", meaning fire) and "-gen" (from Greek "genes", meaning born of or produced by). The word "pyrogen" refers to a substance that produces or generates heat or fever, particularly in a biological context.

Memory Tip

Think of 'fire' ('pyro-') producing something ('-gen'), which helps you remember that a pyrogen is something that generates heat or fever.

Visually Confused Words
progeny
pyogenin
pyogenic
hydrogen
Is this page helpful?