phellem

noun
phel·​lem | \ˈfe-ˌlem \

Definition of phellem 

: a layer of usually suberized cells produced outwardly by a phellogen

First Known Use of phellem

circa 1887, in the meaning defined above

History and Etymology for phellem

Greek phellos cork + English -em (as in phloem)

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The first known use of phellem was circa 1887

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