What does dextrorsal mean?
Dextrorsal is a technical adjective used mainly in botany to describe a twining plant stem that spirals upward in a right-handed direction — clockwise when viewed from above. It derives from the Latin dexter, meaning 'on the right', combined with a suffix indicating turning. Botanists rely on the distinction between dextrorsal and sinistrorsal climbers because twining direction is a stable identifying feature of a species: for example, bindweed twines one way while honeysuckle twines the other. In zoology the word occasionally describes a gastropod shell whose whorls coil to the right, though 'dextral' is the more usual term there. A closely related variant, dextrorse, carries the same meaning and is freely interchangeable with it. Because the word belongs to specialist descriptive vocabulary, it appears almost exclusively in scientific writing rather than everyday speech, where plain phrases such as 'twining to the right' would be used instead.
adjectiveTurning or spiralling to the right; in botany, describing a twining stem or tendril that winds clockwise as seen from above, and in zoology, describing a shell or structure coiled in a right-handed direction.
- (Botany) Of a twining stem or tendril: rising in a spiral that turns to the right, i.e. clockwise when viewed from above.
- (Zoology) Of a coiled structure, such as a gastropod shell: spiralled in a right-handed direction.
"The bindweed's dextrorsal stem wound tightly around the fence post, always curling to the right."
"The field bindweed is readily distinguished from hedge bindweed by its dextrorsal habit of climbing."
"In most gastropods the dextrorsal shell coils clockwise when the apex points away from the observer."
A morning glory climbs by twisting rightward while a honeysuckle twists leftward — botanists needed a whole pair of words just to tell them apart.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dextrorsal
Dextrorsal comes from Latin dexter, meaning 'right' or 'on the right hand', joined to an element indicating a turning motion; it entered scientific English alongside its variant dextrorse during the development of systematic botany in the eighteenth and nineteenth centuries. The same Latin root gives English a family of right-hand words including dextrous, dexterity, ambidextrous, and dextrose. Its natural opposite is sinistrorsal, built on Latin sinister, 'left', and the two terms together allow botanists to classify the twining direction of climbing plants precisely.
Related word forms
How dextrorsal is actually used
A technical term used chiefly in botany and, less often, in zoology; rare in general prose. Note that whether a given plant species is described as dextrorsal depends on the viewpoint adopted, so careful writers specify 'as seen from above'. The variant form 'dextrorse' is equally accepted.
Easily confused with dextrorsal
Dorsal means relating to the back or upper surface of an animal, whereas dextrorsal means turning or coiling to the right.