Scottish National Dictionary (1700–)
†ZAD, n. One of the names of the letter Z (see Z, letter), used attrib. in quot. to indicate some kind of espalier method of growing fruit-trees, resembling a Z.
Sc. 1814 J. Sinclair Agric. Scot. II. 136:
A plan of training, called in Scotland the zad method, has long been employed in some places, it is a modification of the fan-training.
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"Zad n.". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 24 Jun 2019 <https://www.dsl.ac.uk/entry/snd/zad>
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