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A structural unit of bone consisting of a haversian canal and corresponding lamellae of compact bone. Also called haversian system.

[German Osteon, from Greek osteon, bone; see ost- in Indo-European roots.]
References in periodicals archive ?
INTRODUCTION: Osteomyelitis can be defined as an inflammatory condition of the bone, which begins as an infection of the medullary cavity, rapidly involves the haversian systems, and extends to involve the periosteum of the affected area.
From the 30th to the 90th POD, the defect margins presented a compact bone structure with haversian systems and osteocytes (Figures 2 and 3).
The compact bone around it and in the diaphysis is formed by a series of Haversian systems (osteons).