συγκέντρωσις
From LSJ
ὁ γοῦν Ἀνάγυρός μοι κεκινῆσθαι δοκεῖ → did somebody fart, seems to me the Anagyros has been stirred up, I knew someone was raising a stink, the fat is in the fire
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.