Term: barrier: anything serving to maintain separation by obstructing vision or access
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: mixed farming: growing crops and feed and livestock all on the same farm
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: tracer: (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: squandermania: prodigious squandering (usually by a government)
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: springbok: a South African gazelle noted for springing lightly into the air
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: vinifera: common European grape cultivated in many varieties; chief source of Old World wine and table grapes
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: naturopath: a therapist who practices naturopathy
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: futurology: the study or prediction of future developments on the basis of existing conditions
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: first period: the first division into which the play of a game is divided
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: bedpan: a shallow vessel used by a bedridden patient for defecation and urination
Broader: mechanism: a natural object resembling a machine in structure or function | Unrelated: prairie bird's-foot trefoil: North American annual with red or rose-colored flowers