The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods.
To convert into an emulsion; to form an emulsion; to reduce from an oily substance to a milky fluid in which the fat globules are in a very finely divided state, giving it the semblance of solution; as, the pancreatic juice emulsifies the oily part of food.