Is “Duplex” a Scrabble word?
Yes
DUPLEX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Duplex
/ˈduplɛks/
noun
1.A house made up of two dwelling units.
2.A cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.
3.A throwing motion where two balls are thrown with one hand at the same time.
verb
1.To make duplex.
2.To make into a duplex.
3.(juggling) To make a series of duplex throws.
adjective
1.Double, made up of two parts.
2.Bidirectional (in two directions).
“duplex telegraphy”
3.Having horizons with contrasting textures.