This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鑨 combines 金 (metal) with 龍 (dragon), suggesting a metal object or tool associated with dragons, but the exact historical development is uncertain.
The left side is metal 金 and the right side is a dragon 龍. Imagine a metal tool or vessel decorated with a dragon, but its exact purpose is unclear.
For ロウ, imagine a low, rumbling sound like a dragon's growl coming from a metal object: low -> ロウ.