See Also: Piagetian(dictionary)
Black Flagged (Black Flag) - Motor Sports(gambling)
Black Action or Black Play - Blackjack(gambling)
jet-black(dictionary)
black-tie(dictionary)
Black and Tan(encyclopedia)
Black(medicine)
black gum(encyclopedia)
black ice(dictionary)
black eye(dictionary)

black economy (oh) and Piagetian (iou)


black economy (oh)



n [singular]
business activity that takes place secretly, especially in order to avoid tax
-see also black market black market

Piagetian (iou)



Piagetian adjective. M20.
[from Piaget (see below) + -IAN.]
Of or pertaining to the theories or methods of the Swiss educational child psychologist Jean Piaget (1896-1980).