1787 E. Darwin et al. tr. C. Linnaeus et al. I. 385 Isopyrum... Capsules many, moonletted [L. lunulatae], recurved, one-cell'd.
a1802 E. Darwin (1803) v. 33 Allied to fish, the lizard cleaves the flood With one-cell'd heart, and dark frigescent blood.
2000 C. Tudge ii. iii. 130 Diploidy is restored when sperm and egg combine to form a one-celled embryo.