[ dahy-nuh-moh ]
/ ˈdaɪ nəˌmoʊ /
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noun, plural dy·na·mos.

an electric generator, especially for direct current.
an energetic, hardworking, forceful person.



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Origin of dynamo

First recorded in 1882; short for dynamoelectric

Definition for dynamo (2 of 2)


variant of dyna-: dynamometer.
Also dynam-.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for dynamo

British Dictionary definitions for dynamo (1 of 2)

/ (ˈdaɪnəˌməʊ) /

noun plural -mos

a device for converting mechanical energy into electrical energy, esp one that produces direct currentCompare generator (def. 1)
informal an energetic hard-working person

Word Origin for dynamo

C19: short for dynamoelectric machine

British Dictionary definitions for dynamo (2 of 2)


sometimes before a vowel dynam-

combining form

indicating powerdynamoelectric; dynamite

Word Origin for dynamo-

from Greek, from dunamis power
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

Medical definitions for dynamo



Force; energy:dynamogenesis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for dynamo

[ dīnə-mō′ ]

An electric generator, especially one that produces direct current. See more at generator.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.