come under the microscope Definition

microscope
noun

1. Any of a range of instruments consisting of a system of lenses which produce a magnified image of objects that are too small to be seen with the naked eye. See also electron microscope.

Derivative: microscopic

Too small to be seen without the aid of a microscope.

colloq
Extremely small.
Thesaurus: minuscule, minute, diminutive, infinitesimal, imperceptible, indiscernible, negligible; Antonym: huge, vast.

Belonging or relating to, or by means of, a microscope.

Derivative: microscopically
adverb

Derivative: microscopy
noun

The practice or skill of using a microscope in scientific work, etc.

Idiom: come under the microscope (go under the microscope, be put under the microscope)

To be subjected to minute examination.