absorb
ub-ZORB
/əbˈzɔːrb/
To take in or soak up radiation, heat, light, or fluid; or to engross one's attention completely.
In optics, light energy absorbed by matter is converted into thermal internal energy rather than bounced or transmitted.
The story behind the word. From Latin 'absorbere', meaning 'to swallow down or suck in'. In physics, it describes matter capturing incoming light photons and swallowing their energy.
Word relationships
- assimilate: Assimilate emphasizes integrating ideas into a system, while absorb applies broadly to physical and mental taking-in.
- soak up: Soak up is an informal verbal phrase, whereas absorb is standard scientific English.
- emit: Emit gives off energy, opposite to absorbing it.
- reflect: Reflect bounces light away rather than capturing it.
Commonly confused with
- adsorb: Adsorb means collecting molecules onto a surface; absorb means taking them into the volume of the material.
Word family
- absorption (noun): The process of absorbing light, liquid, or energy.
- absorbent (adjective): Capable of taking in or soaking up energy or fluids.
Collocations
- absorb light
- absorb heat
- absorb moisture
- completely absorbed
Idioms & expressions
- absorbed in thought
Example sentences
- "Darker surfaces absorb more radiant heat from the sun than lighter surfaces, making black asphalt hot on summer days." Thermal radiation experiment
- "The graduate student spent weeks in the archives, absorbing rare historical manuscripts for his dissertation." Academic research
Memory hook
ABSORB acts like a sponge, swallowing light and heat energy. Sucking in radiation energy.
When not to use
Do not use if light passes through cleanly or bounces off without loss.
Fun facts
- Vantablack is a synthetic nanomaterial that can absorb up to 99.96% of incoming visible light, making objects look like 2D black holes.
Related words
Explore more words
absorption, endothermic, dissipate, assimilation, assimilate, immersion
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