Children are most commonly infected. Estimated prevalence rates among children in various world regions are 4â28%. Ascariasis: Ascaris, or roundworm, infection is the common helminthic infection in humans, with an estimated worldwide prevalence of 1 billion. The causative organism, A lumbricoides, is cosmopolitan in distribution, being most abundant in tropical countries.
Definition of hollow. 1  1 : an unfilled space : cavity, hole in the hollow of a tree. 2  2 : a depressed or low part of a surface; especially : a small valley or basin.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: small(noun) the slender part of the back. small(adj) a garment size for a small person. small, little(adj) limited or below average in number or quantity or magnitude or extent. a little dining room; a little house; a small car; a little (or small) group.