| coagulum | A clot or a curd; a soft, nonrigid, insoluble mass formed when a sol undergoes coagulation. Origin: L. A means of coagulating, rennet (05 Mar 2000) |
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| closing contraction | Contraction produced at the time of closing of the circuit when using direct current to stimulate the muscle. (05 Mar 2000) |
| closing membranes | Thin sheets, composed of ectoderm externally and endoderm internally, which separate the pharyngeal pouches from the overlying branchial clefts in the early embryo. Synonym: pharyngeal membranes. (05 Mar 2000) |
| closing volume | The lung volume at which the dependent lung zones cease to ventilate presumably as a result of airway closure. (12 Dec 1998) |