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mi·cron (μ),

Former term for micrometer.

micron (μ, mu)

Etymology: Gk, mikros, small
1 See micrometer, def. 2.
2 (in physical chemistry) a colloidal particle with a diameter between 0.2 and 10 μm.


A unit of length equal to 10–6 m.


Former term for the measurement now termed a micrometer.




An SI unit of length equal to one millionth of a metre (10−6 m). Symbol: μm. Syn. micron (obsolete term). See nanometre.


(mcm) (mīkrō-mētĕr, mī-kromĕ-tĕr)
1. One millionth of a meter; formerly called a micron.
2. A device for measuring various objects in an accurate and precise manner.
3. In medicine and biology, the term is usually used with reference to a glass slide or lens that is accurately marked for measuring microscopic forms.
Synonym(s): micrometre.
[micro- + G. metron, measure]


pl. micra, microns [Gr.] micrometer; one thousandth (10−3) of a millimeter or one millionth (10−6) of a meter; abbreviated μm.
References in periodicals archive ?
With quick steering and a fluent ride, the Micra can be chucked into bends without fear of any reprisal.
Entry-level models too are about being cost effective and this Micra is certainly ahead of the game with the Visia very competitively priced while the slightly better equipped Visia+ costs from PS12,945.
The new Micra is packed with features for the safety conscious family driver, including a system which will brake the car for you if it thinks you are going to collide with another car or pedestrian, lane departure warning, hill-start assist and automatic high beam/dipped beam headlights.
For fans of music on the move, that's going to be a deal clincher and in Tekna trim the Micra is exceptionally well kitted out in this class of car.
Handling is sharp, there will be few complaints with the way the car is set up and the Micra makes a fist about being a high end performer.
In November 2015, the data from the Medtronic Micra TPS Global Clinical Trial showed the company's Micra TPS was successfully implanted in 99.
The Nissan Micra first hit the roads more than 30 years ago, and the latest incarnation is still great fun to drive and good value for money, ensuring its continued popularity in the future
With the launch of Micra XE, Nissan seeks to increase its sales volume in the country.
The launch of Nissan's low cost Micra Diesel comes at a time when diesel prices have been steadily rising in the country, causing a shift in buying patterns of Indian consumers.
To accommodate Datsun at the lower end of the spectrum and also to create space for a stripped down and cheaper version of the Micra, Nissan has during the facelift taken the current Micra upwards.
Derbyshire driver Wayne Lander, on his very first trial and driving a Nissan Micra, took victory by just one mark.
Rather than imitating the big sellers, the Micra has tended to stick to its guns, bringing something slightly different to the party and trying to coax car buyers around to its way of thinking.