What's the singular form of megalencephaly? Here's the word you're looking for.
Answer
The noun megalencephaly can be countable or uncountable.
The singular form of megalencephaly is also megalencephaly.
Examples
Hemimegalencephaly is unilateral megalencephaly that is isolated, part of a hemihypertrophy syndrome or the result of hamartomatous overgrowth of one cerebral hemisphere.