A globule is a small drop or blob of something, especially a thick liquid. It was only after you dripped globules of paint all over your bedroom floor that you realized you should have used a drop cloth when you painted the ceiling.
When the word globule first appeared in English during the 17th century, it specifically referred to a tiny round thing, a "little globe or sphere." Its roots go back to the Latin globus, "round mass or ball." These days it's perfectly acceptable to talk about a globule of anything that's dripping or forming a small, blobby mass, like the globules of oatmeal in the hair of an enthusiastic baby at breakfast.