![](/art/med/thumb/bone.gif)
Medical Dictionary
periosteum
noun peri·os·te·um \-tē-əm\
plural -tea \-tē-ə\
Medical Definition of PERIOSTEUM
: the membrane of connective tissue that closely invests all bones except at the articular surfaces
Seen & Heard
What made you want to look up periosteum? Please tell us where you read or heard it (including the quote, if possible).