Here you will find one or more explanations in English for the word Inchpin.
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Inchpin
Inchpin Inch"pin, n. [Written also inchipin, inche-pinne,
inne-pinne.] [Cf. Gael. inne, innidh, bowel, entrail.]
The sweetbread of a deer. --Cotgrave.
Meaning of Inchpin from wikipedia