Animalculist

All at once a botanist, already celebrated, proclaimed that he had seen the embryo forming in the grain of pollen and penetrating the ovule with the pollenical tube. This unexpected animalculist was Schleiden.

Countering ‘ovism’, the rival ‘animalculist’ school regarded spermatozoa, discovered in semen by Leeuwenhoek, as the true source of conception.