| nuclear bag fibre | The largest type of intrafusal muscle fibre's in a neuromuscular spindle, containing a central aggregation of nuclei (nuclear bag). (05 Mar 2000) |
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| Douglas bag | A large bag in which expired gas is collected for several minutes to determine oxygen consumption in humans under conditions of actual work. Origin: C.G. Douglas (05 Mar 2000) |
| farding-bag | The upper stomach of a cow, or other ruminant animal; the rumen. Origin: Of uncertain origin; cf. Fardel. Source: Websters Dictionary (01 Mar 1998) |