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endosymbiotic

Upper-Intermediate (B2)

IPA: /ˌɛndəʊsɪmˈbaɪɒtɪk/

KK: /ˌɛndəʊsɪmˈbaɪɒtɪk/

adjective
Definition

Relating to a type of symbiosis where one organism lives inside the cells or body of another organism.


Example

The endosymbiotic theory explains how certain organelles in eukaryotic cells originated from free-living bacteria.


Conversation
Sloth A
Did you know there are some species that have endosymbiotic relationships with others?
Sloth B
Really? I always thought they were just separate organisms.
Sloth A
Yeah, like how certain algae live inside coral!
Sloth B
That's fascinating! Nature has such interesting partnerships.

Synonyms & Antonyms
Synonyms
symbiotic
mutualistic
cohabiting
Antonyms
parasitic
independent
isolated
Root Explanation

Endosymbiotic → It is formed from "endo-" (from Greek "endon", meaning within) and "symbiosis" (from Greek "symbiosis", meaning living together). The word describes a relationship where one organism lives within another, highlighting the concept of mutual coexistence.

Memory Tip

Think of 'within' ('endo-') and 'living together' ('symbiosis') to remember that 'endosymbiotic' refers to organisms that live together inside one another.

Visually Confused Words
nonsymbiotic
symbiotic
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