The story
Anagram of OSPD (Official Scrabble Players' Dictionary) and OSW (Official Scrabble Words), the two lists on which it was originally based.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: The list of playable words formerly used in tournament Scrabble in most countries, now replaced by CSW. Full definition →
Anagram of OSPD (Official Scrabble Players' Dictionary) and OSW (Official Scrabble Words), the two lists on which it was originally based.
Etymology from Wiktionary, CC BY-SA 4.0.