συγκέντρωσις

English (LSJ)

εως, ἡ, Astron., a simultaneous relation of centres, i.e. when the sun's centre is at that point of the ecliptic which rises, sets, or culminates coincidently with the rising, etc., of a given star, Ptol.Alm.8.5 (pl.).

Greek (Liddell-Scott)

συγκέντρωσις: -εως, ἡ, ἀστρονομικὸς ὅρος παρὰ Πτολ., ὅστις ἑρμηνεύεται ὡς σημαίνων τὴν σύγχρονον σχέσιν τῶν κέντρων.