semiclosed circle

sem·i·closed cir·cle

a circuit for administration of an inhalation anesthetic in which partial rebreathing with carbon dioxide absorption is combined with loss from the circuit of a portion of respired gases through valves.

sem·i·closed cir·cle

(semē-klōzd sĭrkĕl)
Circuit for administration of an inhalation anesthetic in which partial rebreathing with carbon dioxide absorption is combined with loss from circuit of a portion of respired gases through valves.