Usage Note
Biológico covers biological in all its senses: scientific (proceso biológico), ecological (agricultura biológica = organic farming, especially in Spain), and familial (padre biológico = biological father). In Spain, biológico or bio on food labelling is equivalent to 'organic' (certified). In Latin America orgánico is more common for organic food.
Examples
"El reloj biológico regula el sueño."
Natural Translation
The biological clock regulates sleep.

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