Sentence:  And from the Boughs brush off the evil dew, / And heal the harms of thwarting thunder blew, / Or what the cross dire-looking Planet smites, / Or hurtfull Worm with canker'd <WSD>venom</WSD> bites. 
Meaning of the word marked with <WSD> tags:  A poison carried by an animal, usually injected into an enemy or prey by biting or stinging.