hydration
hy-DRAY-shuhn
/haɪˈdreɪ.ʃən/
The process of absorbing and retaining water in biological cells or tissues.
Refers to internal water retention within skin cells, distinct from external oil-based moisturization.
The story behind the word. From classical Greek 'hydor' (water). Chemistry adopted 'hydration' in the 19th century to describe combining a substance with water molecules. In cosmetic science, it evolved to describe holding water inside epidermal cells.
Word relationships
- moisture content: Moisture content is a static physical measurement, whereas hydration emphasizes the active process of water absorption.
- dehydration: Dehydration is the harmful loss or lack of water in biological tissues.
Commonly confused with
- lubrication: Lubrication involves applying oil to reduce friction, whereas hydration involves supplying water into cells.
Word family
- hydrate (verb): To supply water to or cause to absorb water.
- hydrated (adjective): Containing adequate water.
Collocations
- deep hydration
- skin hydration
- cellular hydration
- maintain hydration
Example sentences
- "Adequate cellular hydration maintains skin elasticity and prevents premature fine lines." Health advice
- "Maintaining proper hydration during marathon running is critical for muscular function." Athletic care
Memory hook
HYDRO means water; HYDRATION means keeping water inside skin cells. Water absorption into tissue cells.
When not to use
Do not confuse with surface oiliness or lubrication.
Fun facts
- Dehydrated skin lacks water and looks dull, while dry skin lacks natural oils; skin can be oil-rich but severely dehydrated simultaneously!
Related words
Explore more words
hydrate, Moisturize, homeostasis, absorbent, beverage, absorption
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