Lemizh / English dictionary
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ytàs.
to make an electric inductance unit, an inductance of 1.940 henries (see appendix, Units of measurement)
Etymology
allegedly academic loan of the name of some Ἔττις, a moor where giants were supposed to dwell; to match the capacitance unit and the large value of this unit
The spelling with y was adopted because this was one of the few letters still available for unit symbols.