What is a sign for an office or a shop; as, to hang out one's shingle. [Jocose, U. S.] Shingle oak (Bot.), a kind of oak (Quercus imbricaria) used in the Western States for making shingles called?

shingle — A sign for an office or a shop; as, to hang out one's shingle. [Jocose, U. S.] Shingle oak (Bot.), a kind of oak (Quercus imbricaria) used in the Western States for making shingles. (Webster's 1913.)

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