Fingerpoint

The writer has often observed at times of rapid changes of temperature, notably from a high to a low degree, the velocity of the wind currents great and fluctuating, that friction such as rubbing the feet on carpets would enable one to light a gas-jet by the proximity of a fingerpoint, […]

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Sixty-six per cent described their subjective sensation of discomfort as either gnawing or burning, and almost without exception the distress was sharply localized, usually to a fingerpoint.

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There was the noise of a drawer being operied cautiously and through the glass of the upper half of the door Don could see a fingerpoint of light.

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“But there is no Holy Scripture here.” / “In our minds!” Davis said loudly. “It’s recorded here!” And he tapped a fingerpoint against his temple.

Source: wiktionary