Precocious would be a toddler who can read.
An example of precocious is a two year old being able to read.
- developed or matured to a point beyond that which is normal for the age: a precocious child
- of or showing premature development
Origin of precociousfrom Classical Latin praecox from praecoquere, to boil beforehand from prae-, before (see pre-) + coquere, to mature, cook
- Manifesting or characterized by development, aptitude, or interests considered advanced for a given age: a mathematically precocious child; a child with a precocious wit.
- Botany Blossoming before the appearance of leaves.
Origin of precociousFrom Latin praecox praecoc- premature from praecoquere to boil before, ripen early prae- pre- coquere to cook, ripen ; see pekw- in Indo-European roots.
- pre·coc′ity pre·co′cious·ness
(comparative more precocious, superlative most precocious)
From Latin praecox (“premature, precocious, ripe before time, early ripe"), from praecoquere (“to ripen beforehand, ripen fully, also boil beforehand"), from prae (“before") + coquere (“to cook, boil").