Term: semicentennial: the 50th anniversary (or the celebration of it)
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: hydrastis: small genus of perennial herbs having rhizomes and palmate leaves and small solitary flowers; of northeastern United States and Japan
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: laying: the production of eggs (especially in birds)
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: snuffbox fern: fern of northeastern North America
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: demon: someone extremely diligent or skillful
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: swan orchid: any of several orchids of the genus Cycnoches having slender arching columns of flowers suggesting the neck of a swan
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: demonstrator: a teacher or teacher's assistant who demonstrates the principles that are being taught
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: storm signal: a signal announcing the approach of a storm (particularly a storm of marked violence)
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: great grandson: a son of your grandson or granddaughter
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: refrigeration system: a cooling system for chilling or freezing (usually for preservative purposes)
Broader: fundamental quantity: one of the four quantities that are the basis of systems of measurement | Unrelated: peripatidae: a family of Onychophora