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 अर्थात्
अर्थात्arthātind.(abl. of अर्थ)
(Ablative of अर्थ)
As a matter of course, of course, in fact; मूषिकेण दण्डो भक्षित इत्यनेन तत्सहचरितमपूप- भक्षणमर्थादायातं भवति S. D.1.
According to the circumstances or state of the case; as a matter of fact.
That is to say, namely.
Derived forms and compounds
-कृतम् Performed through the force of implication or as a matter of course; न चार्थात्कृतं चोदकः प्रापयति ŚB on MS.5.2.8.