Lemizh / English dictionary
to make a magnetic flux density unit, a flux density of 10.02 teslas (see appendix, Units of measurement)
shortened form, academic loan of
< Koi ὑδρεί‑ᾱ ‘irrigation, water supply’, abstract noun of
Koi ὕδωρ ‘water’, contamination from plural, ‘voiceless’ initial of
< SHell *wódr̥
< PIE *u̯ódr̥ ‘water’ [inanimate], deverbal noun of
PIE *u̯ed‑ ‘well, gush’
Like most electromagnetic units, Udreà. uses the metaphor. Physicists were running out of letters for unit symbols, which explains the omission of initial x that would be expected here.
See also udreà..