wasp: social or solitary hymenopterans typically having a slender body with the abdomen attached by a narrow stalk and having a formidable sting
hymenopterous insect: insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing
reverse osmosis: (chemistry) a method of producing pure water; a solvent passes through a semipermeable membrane in a direction opposite to that for natural osmosis when it is subjected to a hydrostatic pressure greater than the osmotic pressure