ETYMOLOGY
from Latin mell-, mel (honey) + sonant-, sonans, present participle of sonare (to sound)
EXAMPLE
“… And rise up Sir Iocastus, our deare Knight.
Now hang the hallowed bell about his neck,
We call it a mellisonant Tingle Tangle,
(Indeed a sheep-bell stolne from’s own fat wether.)
The ensigne of his knighthood. Sir Iocastus,
Wee call to mind we promis’d you long since
The President of our Dances place; we are now
Pleas’d to confirme it on you: give him there
His Staffe of Dignity. …”
From: Poems with the Muses Looking-Glasse: and Amyntas
By Thomas Randolph, 1638
Lexicophilia 