Something so small it can't be seen with the naked eye-you have to use a microscope. Viruses and bacteria are MICROSCOPIC.
so small in size it's invisible to the naked eye.
something that cannot be seen with the naked eye and requires a microscope..
an organism or particle that is invisible or indistinct to the naked eye
So small that it can only be seen with a microscope.
Of such a size as to be invisible to the unaided eye but readily visible through a microscope.
Organisms, for example, so small as to be invisible or indistinct without the aid of a microscope. Bacteria are microscopic organisms.
exceedingly minute, visible only under a microscope. millimeter (mm) - one-thousandth of a meter, 0.03937 of a inch, 25.4 mm equals one inch.
too small to be seen except under a microscope
infinitely or immeasurably small; "two minute whiplike threads of protoplasm"; "reduced to a microscopic scale"
too small to be seen with the human eye.
Extremely small-not large enough to be seen with the naked eye. MICROSTRUCTURE-The structure of metals as revealed by examination of polished and etched samples with the microscope.
invisible to the eye without the aid of a microscope or magnifying glass.
adj. Too small to be seen by the unaided eye but large enough to be studied under a microscope.
Extremely small and not visible by the naked eye.
Too small to be seen without a microscope.
Visible only with the aid of magnification.
So small it cannot be seen without the aid of microscope. As opposed to macroscopic (large enough to be seen with naked eye). A tiny tumor is microscopic while a big tumor is macroscopic. See the entire definition of Microscopic
Visible at magnifications above 25x.
Anything that is invisible to the naked eye and can only be seen with the aid of a microscope.
Something so small that it can be seen only when magnified by a microscope.
too small to be seen with the naked eye.
small enough to require the use of a magnifying lens or microscope, not visible to the unaided eye
Too small to be seen by the unaided human eye.
Minute object or structures which are invisible or not clearly distinguished without the use of a microscope.
Of extremely small size, visible only by the aid of a microscope.