nematocyst

As nouns the difference between capsule and nematocyst

is that capsule is a membranous envelope while nematocyst is a capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting.

In biology|lang=en terms the difference between nematocyst and cnidoblast

is that nematocyst is (biology) a capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting while cnidoblast is (biology) a cell in the epidermis of cnidarians in which the nematocyst develops.

As nouns the difference between nematocyst and cnidoblast

is that nematocyst is (biology) a capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting while cnidoblast is (biology) a cell in the epidermis of cnidarians in which the nematocyst develops.