Definition of "boyle"

What makes the Divell so divelish, I would aske you, / Sathan, our common enemie, but his being / Perpetually about the fire, and boyling / Brimstone and Arsnike?

1610?, Ben Jonson, The Alchemist

To cause nurses to have abundance of milk, I have taken the fresh branches or tops of fennell, and boyled them in water or wine, and given it to drinke at dinner or supper, and at all times, for it greatly augmenteth the milk.

1652, Leonard Phioravant, Three Exact Pieces

Yet I observed that the Water at the burning place did boyle, and heave like Water in a Pot upon the Fire, though my hand put into it perceived it not so much as warm.

1666, Philosophical Transactions

... a boyle or impostume comen forthe & broken

1541, Sir Thomas Elyot, The Castel of Health

And they toke it, and layed it on the boyle, and he recouered.

1560, The Bible and Holy Scriptures. With Annotations, page 175

And they took ashes of the fornace, and stoode before Pharaoh , and Moses sprinkled it toward heauen: and it became a boyle breaking forth with blaynes, upon man, and upon beast.

1613, The holy bible: conteining the old Testament and the New: Newly Transl. out of the Originall Tongues