ἀμνεῖος
From LSJ
ὤδινεν ὄρος, Ζεὺς δ' ἐφοβεῖτο, τὸ δ' ἔτεκεν μῦν → the mountain was in labor — even Zeus was afraid — but gave birth to a mouse
English (LSJ)
α, ον,
A of lamb, ἀ. χλαῖνα lambskin cloak, Theoc.24.62:— also ἀμναῖος, PRev.Laws97.7 (iii B. C.). II ἀμνειός or ἄμνιος (sc. χιτών, ὑμήν), ὁ, inner membrane surrounding the foetus, Sor.1.58, Gal.UP15.4: also in neut. form ἀμνεῖον, τό, Hippiatr.14; cf. ἀμνίον.