immature baby

immature baby

[iməchoo͡r′]
Etymology: L, im, not, maturus, ripe
a term sometimes applied to an infant who weighs less than 1134 g (2.5 lb) and who is significantly underdeveloped at birth.
References in periodicals archive ?
SHARJAH First of all people for visiting us and playing against our boys and which feel they are go to gain and experience and field and we are going to have more co-operation in the future and in the UAE hockey is immature baby and we will take there experience and advice to our boys and we are going to plan to in their own country and few days and weeks and this is the plan.
He has a tremendous amount of natural ability, but he still looks a big, immature baby at the moment.
To Godolphin, he is a raw, immature baby, and one for whom international glory could beckon next year and beyond.