eggar: moth having nonfunctional mouthparts as adults; larvae feed on tree foliage and spin egg-shaped cocoons
organism: a living thing that has (or can develop) the ability to act or function independently
vasoconstrictor: any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure