slatted

Concise Oxford English Dictionary © 2008 Oxford University Press:
slat/slat/

▶noun a thin, narrow piece of wood or other material, especially one of a series which overlap or fit into each other, as in a Venetian blind.

– derivatives
slatted adjective.

– origin ME (in the sense ‘roofing slate’): shortening of OFr. esclat ‘splinter’.