What does osmotically mean?
Osmotically is the adverb form of osmotic, describing an action or change that occurs by osmosis. Osmosis is the movement of solvent, most often water, across a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration. In biology, osmotically active structures can draw or lose water because of differences in dissolved substances, influencing cell volume, plant growth, and fluid balance. The word also has a figurative use for movement or adjustment that resembles this process, implying a gradual shift toward balance. It is chiefly a scientific term, and its figurative use is less frequent but useful for describing natural balancing, diffusion-like transfer, or convergence. In technical writing, “osmotically driven” commonly describes a process caused by differences in concentration across a membrane.
adverbIn a manner involving osmosis, especially the movement of a solvent across a selectively permeable membrane toward a solution with a higher solute concentration. It can also describe movement or transfer achieved through such a natural balancing process.
- By means of osmosis.
- In a manner resembling osmosis, especially as a gradual balancing or transfer toward equilibrium.
"The cells continued to expand osmotically as water moved into them through their membranes."
"Freshwater fish can become osmotically stressed when the salt concentration of their surroundings changes."
"The design allows the material to contract osmotically as the surrounding solution changes."
Your body may not know it, but every sip of water relies on osmosis: the quiet movement of water across cell membranes keeps your cells supplied and balanced.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of osmotically
The word belongs to a family derived from Greek osmē, meaning “push” or “urge,” through the related scientific term osmosis. The suffix -otic is used in words describing conditions or processes involving osmotic pressure or the movement of solvent across a membrane. The adverb osmotically was formed by adding the adverbial suffix -ly to osmotic.
Related word forms
How osmotically is actually used
This is a technical term, most often used in biology, chemistry, materials science, and related fields. The figurative sense, describing a gradual balancing or transfer, is less common and usually conveys a sense of natural adjustment toward equilibrium.
Easily confused with osmotically
Osmosis is the process itself, whereas osmotically is an adverb describing how an action or change occurs by that process.