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Abernethy, Laurence (c. 1400–1463)

in Oxford Dictionary of National Biography

September 2004; p ublished online September 2004 .

Reference Entry. Subjects: History; History of Agriculture; Agriculture and Farming. 3 words.

See Abernethy family

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aberration

Edited by Andrew J. Butterfield and John Szymanski.

in A Dictionary of Electronics and Electrical Engineering

June 2018; p ublished online June 2018 .

Reference Entry. Subjects: Electronic Engineering. 14 words.

A defect in the image produced by an optical or electronic lens system.

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abeyance

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 41 words.

1. A state of suspension, temporarily inactive, cessation or put to one side for a period of time.

2. When

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abioseston

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 8 words.

Non-living particulate matter found floating in watercourses.

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abiotic

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 22 words.

Non-living chemical and physical matter (not biological). Abiotic components are parts of the environment; water, sunlight, oxygen, temperature, soil, and

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ablation

Carl Schaschke.

in A Dictionary of Chemical Engineering

January 2014; p ublished online September 2014 .

Reference Entry. Subjects: Engineering and Technology. 52 words.

The removal of material by *erosion, *evaporation, or *chemical reaction. For short-term protection against

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ablation cooling

Tony Atkins and Marcel Escudier.

in A Dictionary of Mechanical Engineering

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Mechanical Engineering. 96 words.

The cooling of a surface exposed to very high external gas temperature which causes the surface material to sublime, melt

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ablimaton

Carl Schaschke.

in A Dictionary of Chemical Engineering

January 2014; p ublished online September 2014 .

Reference Entry. Subjects: Engineering and Technology. 3 words.

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ablution fitting

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 12 words.

A large communal sanitary fitting used to perform ritual washing.

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Abney level

Christopher Gorse, David Johnston and Martin Pritchard.

in A Dictionary of Construction, Surveying and Civil Engineering

January 2012; p ublished online January 2013 .

Reference Entry. Subjects: Engineering and Technology. 14 words.

A hand-held instrument to measure vertical angles. See also clinometer of action.

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