erg
Concise Oxford English Dictionary © 2008 Oxford University Press:
erg1 /əːg/
▶noun Physics a unit of work or energy, equal to the work done by a force of one dyne when its point of application moves one centimetre in the direction of action of the force.
– origin C19: from Gk ergon ‘work’.
Concise Oxford English Dictionary © 2008 Oxford University Press:
erg2 /əːg/
▶noun (pl. ergs or areg /ˈɑːrɛg/) an area of shifting sand dunes in the Sahara.
– origin C19: from Fr., from Arab. ‘irk, ‘erg.
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