Entomology. the frothy secretion exuded by spittlebugs.
Origin
1470-80; blend of Middle Englishspit (noun) (see spit1) and spetil,Old Englishspǣtl, variant of spātl saliva
Examples from the web for spittle
The problem is spittle, which has recently been flying in all directions.
Back that ill-informed truck up and let me kick this post into high spittle.
Oh, the snark that flew and more than one screen had to have the spittle and venom removed.
There's another warping convulsion, and spittle sails from his mouth.
So the real test will be how the particle physics community responds, whether with spittle-flecked ire or reasoned argument.
They hung up the curtains in the bed-chamber, and fastened them with adder spittle.
For those of us not within immediate range of the flying spittle, umpire-baiting can be as mesmerizing as it is repugnant.
Where the straits are perilous, more hungry spittle.
They're spittle-flecked orcs, incapable of opening their minds, quick to condemn and fume and engage in conspiracy-mongering.
Also a mud of spittle and dust was used on occasions of this sort.
British Dictionary definitions for spittle
spittle
/ˈspɪtəl/
noun
1.
the fluid secreted in the mouth; saliva or spit
2.
Also called cuckoo spit, frog spit. the frothy substance secreted on plants by the larvae of certain froghoppers
Word Origin
Old English spǣtl saliva; see spit1
Word Origin and History for spittle
n.
late 15c., "saliva, spit," probably an alteration (by influence of spit (v.)) of Old English spætl, spatl, from Proto-Germanic *spætlan, which is related to Old English spætan "to spit."