Comparable entry, according to Adler, in the Ambrosian Lexicon (1253).
The headword -- which must be quoted from somewhere but is otherwise unattested -- is in fact a perfect imperative, middle/passive, of the verb e)cori/zw (see LSJ at web address 1). Cf. epsilon 1807, epsilon 1808.
Other occurrences of misinterpretation in determining verbal forms at alphaiota 323, delta 1250, epsilon 2503, eta 37, iota 160.