[Description] The card in a pile which doesn't have any cards on top of it; this is true even if the cards are fanned down [Term] 
Topmost card
A v a i l a b l e c a r d s
R e l e a s e d c a r d s
S u i t a b l e c a r d s
B a s e c a r d
T o p m o s t c a r d
R e d e a l
M a r r i a g e
L a n e