STOPPED END: A plain vertical surface which forms the end of a wall.

TOOTHED END OR TOOTHING: The form produced at the end of a wall by recessing every other course by half a block (Fig. 1) in order that the wall may be extended later using the same bond.

RACKING BACK: As an alternative to toothing, the end of a wall may be set back half a block at each course (Fig. 1). This is also done so that the wall may be extended later using the same bond.

http://autonopedia.org/buildings-and-shelter/rural-building/...

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Note added at 9 hrs (2013-12-17 07:49:56 GMT)
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http://autonopedia.org/wp-content/uploads/buildings-and-shel...

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Note added at 2 days5 hrs (2013-12-19 03:47:48 GMT)
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or not necessarily at the end of the wall:

walls to be built with toothing (to later connect to side walls)
[http://en.wikipedia.org/wiki/Glossary_of_British_bricklaying]

or with toothed brickwork for connection to side walls / at junctions of partition walls and external walls; i.e. the external walls should be built with toothing / toothed brickwork left in places where will later be connected side walls.
[http://www.diyfixit.co.uk/building/demolishing-a-brick-wall....]