MOHI SINODI (az yun. synodos— qiron, nazdikshavi), fosilai vaqtest bayni du fazai yakkhelai paydarpai Moh (mas., az hilol to hilol).
Mohi sinodi asosi solshumorii qamari gardid, ki on dar zamonhoi qadim az zarurati ba hisob giriftani fosilahoi kaloni vaqt paydo shuda bud va dar on mohho bonavbat 29 va 30 shaboruzi hisob karda meshudand. Dar asl boshad, har yak mohi navi astronomi ba sababi ellipey budani madori Moh va lagzishi girehi mador az 29,25 shaboruz to 29,83 shaboruz tagyir yofta meistad. Dar zamoni mo qimati miyonai Mohi sinodi ba 29,530588 shaboruzi oftobi yo 29 shaboruzu 12 s 44 daq 2,28 son barobar ast.