erratic

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Related to erratically: decisively, tumultuously

erratic

a piece of rock that differs in composition, shape, etc., from the rock surrounding it, having been transported from its place of origin, esp by glacial action

erratic

[ə′rad·ik]
(geology)
A rock fragment that has been transported a great distance, generally by glacier ice or floating ice, and differs from the bedrock on which it rests.
References in periodicals archive ?
police stopped the vehicle which was driving erratically and talked to the driver who seemed impaired by alcohol.
15pm on October 31 that a woman was driving erratically on the A1.
A joint statement by South Yorkshire Police and the IPCC said: "Prior to the collision, the Vauxhall Vectra saloon had been briefly pursued by a police vehicle after it had been seen to be driven erratically.
The sign's numbers now move lower, but they fluctuate erratically with the first buybacks of government debt in nearly 70 years and the reduction in borrowing.
Indeed, an individual driving erratically enough can readily induce the sorts of traffic jams normally associated with much heavier traffic (SN: 7/3/99, p.
It's dramatic, but I also wanted a metaphoric meaning--that those ravaging winds were choosing what to destroy as erratically as soon-to-invade AIDS was.
133, Accounting for Derivative Instruments and Hedging Activities, causes bank earnings to swing erratically, as it is expected to.
0 percent as the output of appliances and air conditioners, which had moved erratically in recent months, fell back.
Lisa, 34, is acting erratically on the set of the hit series.
The economic history of the Islamic world has developed slowly and erratically.
40am emergency services were called to a report of a man carrying an axe, and what was thought to be a handgun, acting erratically outside a property on Clipsley Lane.
Henry Atkins, of Chalwood, Deighton, was seen driving erratically by police on April 19.