Definition of optical tweezers in English:

optical tweezers

Syllabification: op·ti·cal tweez·ers

Entry from US English dictionary

noun

A device that uses light from a low-wattage laser to manipulate individual molecules within cells. Also called laser tweezers.

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Word of the day setose
Pronunciation: ˈsiːtəʊs
adjective
bearing bristles or setae; bristly