The word "microscopic" means something that is extremely tiny and can only be seen with the help of a microscope, which is a special tool used to magnify small objects. Full definition
This is an excellent example of the fact that efficiency enhancement in modern combustion engines is now taking place at microscopic levels. (media.volvocars.com)
The majority of internal parasites are diagnosed by microscopic examination of the feces for eggs that are released by the adult female in your pet's intestine. (lbah.com)
All these processes would occur in microscopic pockets of liquid within the ice. (discovermagazine.com)