mes·o·the·li·um 
(mĕz′ə-thēlē-əm, mĕs′-)
(mĕz′ə-thēlē-əm, mĕs′-)n. pl. mes·o·the·li·a (-lē-ə)
The layer of flat cells of mesodermal origin that lines the embryonic body cavity and gives rise to the squamous cells of the peritoneum, pericardium, and pleura.
[MESO- + (EPI)THELIUM.]
mes′o·theli·al adj.
- irradicably
- irrational
- irrationalism
- irrationality
- irrationally
- irrationalness
- irrational number
- Irrawaddy
- irreal
- irreality
- irreclaimability
- irreclaimable
- irreclaimableness
- irreclaimably
- irreconcilability
- irreconcilable
- irreconcilably
- irrecoverable
- irrecoverably
- irrecusable
- irrecusably
- irredeemable
- irredeemably
- irredenta
- irredentism