ˌvīd. ə lˈa(a)rēəm, ˌvid.- noun
( plural vitellar·ia -ēə)
Etymology: New Latin, from vitell- + -arium
1. : a modified part of the ovary that in many flatworms and rotifers produces yolk-filled cells serving to nourish the true eggs — distinguished from germarium
2. : the part of an insect ovariole in which the egg cells grow to mature size