V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry अपर्वन्
अपर्वन्aparvana.Without a joint. -n.
Without a joint. -Neuter
No joint or point of conjunction.
A day which is not a पर्वन्id est, that is not the proper time or season (the Parva days being अमा- वास्या, पौर्णिमा, अष्टमी, चतुर्दशीetc.); अपर्वणि ग्रहकलुषेन्दुमण्डला विभावरी कथय कथं भविष्यति M.4.16.