PTS Pali-English dictionary - The Pali Text Society's Pali-English dictionary
Māsalu
Māsalu,[reading uncertain] only Instr.māsalunā Miln.292,Trenckner says (note p.428):“m.is otherwise unknown,it must mean a period shorter than 5 months.Cp.Sk.māsala.” -- Rh.D.(trsl.II.148) translates “got in a month,” following the Sinhalese gloss.‹-› The period seems to be only a little shorter than 5 months; there may be a connection with catu in the word.(Page 531)