- so small as to be invisible or indistinct without the use of the microscope: microscopic organisms.Compare macroscopic.
- very small; tiny.
- of, relating to, or involving a microscope: microscopic investigation.
- very detailed; meticulous: a microscopic view of society.
- suggestive of the precise use of the microscope; minute: microscopic exactness.
Origin of microscopic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for microscopical
After some time the result of this microscopical work appears.The Industries of Animals
No microscopical alterations in the corpuscles are to be observed.Histology of the Blood
Microscopical technique also had been greatly improved since 1828.Form and Function
E. S. (Edward Stuart) Russell
The object or material to be examined is placed on a microscopical slide.Human Foods and Their Nutritive Value
In all cases identify the particles that sink by microscopical examination.All About Coffee
William H. Ukers
less commonly microscopical
- not large enough to be seen with the naked eye but visible under a microscopeCompare macroscopic
- very small; minute
- of, concerned with, or using a microscope
- characterized by or done with great attention to detail
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for microscopical
Online Etymology Dictionary, © 2010 Douglas Harper
- Too small to be seen by the unaided eye but large enough to be studied under a microscope.
- Of, relating to, or concerned with a microscope.
- Being or characterized as exceedingly small; minute.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.