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Watershed
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Subterminal
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Perseids
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Arteriole
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SNMP
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Condyloma
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Dose
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Extinction
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Homeotherm
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Laboratory mouse
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Ectropion
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Electrophile
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Kilobar
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Nuclear moderator
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Imidazoles
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Lunar Reconnaissance Orbiter
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Gluon
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Venus Entry Probe
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Osteoblast
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Fibrocystic breast disease
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Entomology
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UEPS
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BitTorrent
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Mesoglea
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Vector
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Stall angle
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Zenith distance of a direction
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Correspondence principle
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Vitamin B2
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Perihelion
Erg
The term erg is used in geography and physics.
Geography
An erg is a desert with wind dunes. In the Sahara, ergs constitute 20 % of the surface area.
Physics
Erg is the abbreviation of the Greek ergon. It is a unit of measurement for work in the CGS system (physical measurement unit system).
1 erg is equal to 10-7 joules.
There are many ergs in the Sahara. © Alex Lichtenberger, Flickr CC by-nc-nd 2.0
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