Lewis Short
Pandāna (noun F) : 2. pando
* One of the oldest gates of Rome, so called because it always stood open: Saturnia porta, quam Junius scribit, ibi, quam nunc vocant Pandanam,Varr. L. L. 5, § 42 Müll.; Sol. 1, 13: Pandana porta dicta est Romae, quod semper pateret,Fest. p. 220 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary