different between endrin vs endpin

English

endrin (uncountable)

(organic chemistry) A toxic chlorinated polycyclic epoxide previously used as a pesticide and now considered a persistent organic pollutant.
Coordinate terms: aldrin, dieldrin

endrin n

end +? pin

endpin (plural endpins)

(music, lutherie) The spike of a cello or double bass that makes contact with the floor and supports the weight of the instrument.
(lutherie) Synonym of endbutton.

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