| knock | 1. Colloquialism for a blow, especially a blow to the head. 2. A sound simulating that of a blow or rap. (05 Mar 2000) |
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| knock-knee | <medicine> A condition in which the knees are bent in so as to touch each other in walking; inknee. Source: Websters Dictionary (01 Mar 1998) |
| knock-knees | In medicalese: there are no knock-knees. The condition is genu valgum. (12 Dec 1998) |
| knock-out drops | A popular name for chloral alcoholate given with criminal intent to produce unconsciousness rapidly; it is formed by adding chloral hydrate to beer or some stronger alcoholic liquor. (05 Mar 2000) |
| knockings | <chemical> Large lumps picked out of the sieve, in dressing ore. Source: Websters Dictionary (01 Mar 1998) |
| knockout | <genetics, molecular biology> Informal term for the generation of a mutant organism in which the function of a particular gene has been completely eliminated (a null allele). See: homologous recombination, transposon. (18 Nov 1997) |
| knockstone | <chemical> A block upon which ore is broken up. Source: Websters Dictionary (01 Mar 1998) |
| pericardial knock | An early diastolic sound analogous to the normal third heart sound, but occurring somewhat earlier, due to rapid ventricular filling being abruptly halted by the restricting pericardium; a truly "knocking" quality is uncommon. (05 Mar 2000) |
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