foundation stone(n = noun.artifact) - a stone laid at a ceremony to mark the founding of a new building;
is a kind of stone
is a part of building, edifice

abrading stone, alum stone, amazon stone, arch stone, bladder stone, blarney stone, blue stone, caen stone, carved in stone, cherry stone, china stone, cinnamon stone, coping stone, edward durell stone, emery stone, flowering stone, foundation, foundation garment, grindle stone, harlan f. stone, harlan fisk stone, harlan fiske stone, harlan stone, i. f. stone, isidor feinstein stone, kidney stone, lay the foundation, leave no stone unturned, living stone, lucy stone, moabite stone, national science foundation, new stone age, oliver stone, paving stone, perpend stone, perpent stone, philanthropic foundation, philosopher's stone, philosophers' stone, portland stone, precious stone, private foundation, pudding stone, pumice stone, purbeck stone, raft foundation, ro-setta stone, rolling stone, rosetta stone, set in stone, standing stone, stepping stone, sticks and stone, stone, stone age, stone age man, stone bass, stone bramble, stone breaker, stone cold, stone crab, stone cress, stone curlew, stone drill, stone faced, stone facing, stone fly, stone fruit, stone life face, stone marten, stone mimicry plant, stone parsley, stone pine, stone pit, stone plant, stone root, stone wall, swiss stone pine, without foundation