Term: ventilation: a mechanical system in a building that provides fresh air
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: upupidae: hoopoes
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: storm petrel: any of various small petrels having dark plumage with paler underparts
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: ringhals: highly venomous snake of southern Africa able to spit venom up to seven feet
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: flit: a sudden quick movement
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: nictitating membrane: a protective fold of skin in the eyes of reptiles and birds and some mammals
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: dignity: the quality of being worthy of esteem or respect
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: principalship: the post of principal
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: carbonic acid: a weak acid known only in solution; formed when carbon dioxide combines with water
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: dollar: a piece of paper money worth one dollar
Broader: mechanical system: a system of elements that interact on mechanical principles | Unrelated: stabber: someone who stabs another person