Same headword, according to Adler, in the Ambrosian Lexicon (2518); and see under alphaiota 148 (and epsiloniota 143). As to the gloss, it is unparalleled elsewhere. (One might suspect its first word should be the definite article h(, but Adler does print h)/, and flags up no manuscript variants.)
The headword can be used figuratively: tranquillity, peace of mind.