The Collaborative International Dictionary of English v.0.48:
echinococcosis \e*chi"no*coc*co`sis\ ([e^]*k[imac]"n[-o]*k[o^]k*k[=o]`s[i^]s), n. (Med.) infestation with echinococci (tapeworms). An infection with the larval form is called hydatid disease. [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
hydatid disease n 1: infestation with larval echinococci (tapeworms) [syn: echinococcosis, hydatid disease, hydatidosis]