What does "hatchling" mean?

A newly hatched bird, reptile or other animal that has emerged from an egg.

What is a synonym for "hatchling"?

Common synonyms include: chicks, juvenile, neonate, newborn, offspring, young.

Pronounced //ˈhæt͡ʃlɪŋ//.

/ˈhæt͡ʃlɪŋ/ noun

noun ·Rare ·Advanced level

Noun

1
A newly hatched bird, reptile or other animal that has emerged from an egg.
"The hatchling alligator had just broken out of its shell but was already trying to follow its mother, who hunted hatchling birds."
2
any recently hatched animal (especially birds) wordnet
3
A person who has (especially recently) realized that they are transgender.

"I don't know what has become of the hatchling."

From hatch + -ling. Sense 2 in reference to the term crack one's egg (“realize one is transgender”).