Scottish National Dictionary (1700–)

from 1976 supplement

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AITKEN. In combs. Aitken effect, the dust-free space observed immediately surrounding a heated object placed in a dusty or smoky atmosphere, an effect later applied to the thermal precipitator; Aitken nuclei, dust particles on which vapour condenses to form fogs and clouds, and which cause the colours of the sunset.

[From John Aitken (1839–1919), of Falkirk, F.R.S., engineer and meteorologist, who propounded these theories. See e.g. Philosoph. Trans. Royal Soc. London Ser. A. CCI. 551.]

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"Aitken ". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 27 Sep 2021 <>



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