What does lytta mean in Latin?

lytta, a noun, means “A worm said to cause madness to dogs”.

What is the genitive of lytta?

The genitive singular is lyttae. lytta is feminine, first declension.

noun · femininefirst declension

lytta f (genitive lyttae)

lytta, ae, f., = λύττα,

I. a worm under a dog's tongue, said to cause madness, Plin. 29, 5, 32, § 100.

From Ancient Greek λύττα (lútta), variant of λύσσα (lússa, “lyssa, rabies”), then "sign of rabies under the tongue."