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 ?
In the moments after the Alderson Road shooting, witnesses reported seeing a dark coloured car being driven erratically on Lawrence Road, which shares a junction with Alderson.
'On interrogation, the suspect claimed to be under spiritual attacks which always make him behave erratically sometimes.
A West Yorkshire Police spokeswoman said: "We are now appealing for information from members of the public who may have been in the vicinity on Tuesday night and saw the vehicle driving erratically.
Teesside Magistrates' Court heard that Turnbull's car was seen "stalling" and "driving erratically" along the road on August 18.
Gallacher, of Virginia Water, Surrey, was on her way to meet her children following the night out when she was seen driving erratically by witnesses in the town at about 11am, the court was told.
Police say they spotted a vehicle driving erratically on the Felling Bypass at around 12.30pm and signalled for the driver to pull over.
When officers tried to talk to Fisher, the vehicle's driver, he allegedly was noncompliant and behaved erratically, and police believed he was under the influence of intoxicants.
He was stopped by police less than an hour before his death when his Mercedes was seen driving erratically but the star fled the vehicle.
Summary: TEHRAN (FNA)- A student of the University of South Alabama was shot dead by a police officer on Saturday morning only because he was acting erratically and repeatedly charged at the officer.
by police officials in London for driving erratically.ritish Transport Police (BTP) said a man matching his description ran away after a car being driven "erratically" was stopped shortly before the incident took place.
stopped a vehicle after seeing it being driven erratically. The driver had a strong odour of alcohol on his breath.
I have just come in from work (8.15pm) and have come across three cyclists (in the space of around 10 minutes) with no lights, no reflective clothing and one actually was on a mobile phone and was riding the bike one-handedly and erratically with no concern for any other road user.