accelerograph
(military) An apparatus for studying the combustion of powder in guns, etc. / (geology) An instrument used to record the acceleration of the ground during an earthquake.
(Scotland, Ireland, Northumbria) A small cottage, especially one for communal use in remote areas by labourers or farmhands.
An optoisolator
A lesion under the skin of cattle, caused by the larva of a bot fly of genus Hypoderma. / A small hard swelling on a horse's back, caused by the galling of the saddle.
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