| microfilaria | The prelarval stage of filarioidea in the blood and other tissues of mammals and birds. They are removed from these hosts by blood-sucking insects in which they metamorphose into mature larvae. (12 Dec 1998) |
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| sheathed | 1. Povided with, or inclosed in, sheath. 2. <botany> Invested by a sheath, or cylindrical membranaceous tube, which is the base of the leaf, as the stalk or culm in grasses; vaginate. Source: Websters Dictionary (01 Mar 1998) |
| sheathed artery | <anatomy, artery> A subdivision of the penicillus of the spleen surrounded by macrophages and a reticular stroma. (05 Mar 2000) |