σύγχροος
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
ον, contr. σύγχρους, ουν, (χρόα)
A of like colour or look, Plb. 3.46.6. II skin to skin, touching, Posidipp. ap. Ath.13.596d, Nic. Fr.32.