crossing barrier

crossing barrier

[′krȯs·iŋ ‚bar·ē·ər]
(genetics)
Any of the genetically controlled mechanisms that either prevent or significantly reduce the ability of individuals in a population to hybridize with individuals of other populations.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
From a performance viewpoint, a crossing barrier design requires more length to achieve the same surface area at the barrel wall.
BERT HOUSTON A train driver was left with just seconds to make a decision when he saw part of a level crossing barrier blocking the line ahead.
A TEENAGE driver who ploughed into two young women outside a Newport nightclub in a terrifying hit and run had previously led police on a highspeed chase on the M4 and crashed through a Second Severn Bridge crossing barrier.
ATEENAGE driver who ploughed into two young women outside a Newport nightclub in a terrifying hit and run had previously led police on a high-speed chase on the M4 and crashed through a Second Severn Bridge crossing barrier.
Former South Wales Guardian editor Shaun Greaney added: "I had the privilege of campaigning with Denzil for a level crossing barrier at the notorious and dangerous Tirydail rail crossing in Ammanford in the early nineties.
"In a completely separate and unrelated incident, a lorry struck the Smithy Bridge level crossing barrier while it was down.
Man who climbed through level crossing barrier and was inches away from speeding train 'one of the most stupid things' senior police officer had ever seen
During a pursuit the car collided with a level crossing barrier before crashing.
crossing barrier. He was arrested and has been questioned, a police
Witnesses said the bus went through a closed crossing barrier, and passengers said they screamed "Stop, stop!" just before impact.