English

Noun

osmoticum ‎(plural osmotica)

1. (biology) Any substance that acts to supplement osmotic pressure in a plant or a culture of plant cells
   • 1998 June 19, Emanuel Epstein, “How Calcium Enhances Plant Salt Tolerance”, in Science, volume 280, number 5371, DOI:10.1126/science.280.5371.1906, pages 1906-1907:

     Second, potassium is a major osmoticum of plant cells, an especially crucial feature for plants under high-salt conditions, and one requiring controlled partitioning of the element among organs, tissues, and cell compartments.