A biological term which refers to the ability to move spontaneously and independently. It can apply to either single-celled or multicellular organisms.
Found on http://www.nano.org.uk/nano/glossary.htm
A parameter recorded during microscopic examination of semen in the standardized breeding soundness evaluation quantifying spermatozoa movement, expressed as the percentage demonstrating forward progressive motility. Found on http://www.cattlepages.com/dictionary/