ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
οὖσα, ὄν;part. prés. de εἰμί.
including the feminine ousa; and the neuter on present participle of εἰμί; being: be, come, have.