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portfolio worker
Porthcawl
porthole
Portia
portico
portière
portion
Portland
Portland cement
Portland, Isle of
portly
portmanteau
portmanteau word
Porto
Porto Alegre
Porto-Novo
portobello
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Portland cement
Port·land ce·ment or port·land ce·ment


noun 
Definition:
 
limestone and clay cement: a cement that hardens under water, made by burning limestone and clay
[Because a similar color to stone, quarried on the Isle of Portland, S England]
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