| Leeuwenhoek's canals | <anatomy> The small Vascular canal's that run longitudinally in the centre of haversian systems of compact osseous tissue, through which the blood vessels ramify in bone. Synonym: Leeuwenhoek's canals. (05 Mar 2000) |
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| leeway space | The difference between the combined mesiodistal widths of the deciduous cuspids and molars and their successors. (05 Mar 2000) |