What does OSA stand for?

Old Stone Age (gaming forums)

This definition appears very rarely and is found in the following Acronym Finder categories:

Slang/chat, popular culture

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Samples in periodicals archive:

But analysis of more recent finds revealed that they were from the Upper Palaeolithic period - the end of the Old Stone Age, dating from about 12,000BC.

14,000-year-old tools reveal country's earliest 'village'

But recent analysis of the flints revealed they were in fact from the end of the Upper Palaeolithic - Old Stone Age - period, 14,000 years ago.

THE OLD TOWN; Settlement dates back 14,000 years

Other objects on show in a range of other galleries will include the Old Stone Age Eltringham flint - the oldest human-made object in the region; a sperm whale jaw; the Anglo-Saxon Rothbury Cross; objects from the voyages of Captain Cook; live animal displays; a full-size T-Rex model skeleton from the US; and a huge Brazilian amethyst.

Culture: 12 things to look forward to in 2009; A new year brings ...

95) ABOUT 35,000 years ago, there was a major flowering of artistic expression in the caves of Old Stone Age Europe.

Portrait of the cave artists

Every age since the Old Stone Age has been an Age of Paradox, just as every age has been an Age of Transition.

In the land of fulfillment

Warwickshire's oldest families AS few as 40 people could have inhabited Warwickshire during the Old Stone Age, when small family groups roamed in search of food and used simple stone tools.

Jigsaw that takes years to complete; THE HARD PART ISN'T DIGGING UP ...

Such figures are known from several caves associated with the Old Stone Age or Paleolithic Perigordian phase of culture of the Pyrenees, dating back to some 25,000 years before the present.

Mutilated humanity

The stone structure, containing hundreds of mammal fossils and stone implements, was between 10,000 and 40,000 years old and presumably dated back either to the end of the Old Stone Age or the start of New Stone Age, according to Cai Huiyang, a top archaeologist with the Guizhou Provincial Museum.

Prehistoric man's cave found in southwest China