DEXTRORSE
dextrorse, dextrorsal
(adjective) spiraling upward from left to right; “dextrorse vines”
Source: WordNet® 3.1
Etymology
Adjective
dextrorse (comparative more dextrorse, superlative most dextrorse)
Turning from the left to the right, in the ascending line, as in the spiral inclination of the stem of the morning glory.
Usage notes
• At present scientists predicate dextrorse or sinistrorse quality of the plant regarded objectively; formerly the plant was regarded subjectively, and what is now called dextrorse was then considered sinistrorse.
Antonyms
• sinistrorse
Source: Wiktionary
Dex*tror"sal, Dex"trorse`, a. Etym: [L. dextrorsum, contr. fr.
dextrovorsum, dextroversum, toward the right side; dexter right +
versus, vorsus, p. p. of vertere, vortere, to turn.]
Definition: Turning from the left to the right, in the ascending line, as
in the spiral inclination of the stem of the common morning-glóry.
Note: At present scientists predicate dextrorse or sinistrorse
quality of the plant regarded objectively; formerly the plant was
regarded subjectively, and what is now called dextrorse was then
considered sinistrorse.
Source: Webster’s Unabridged Dictionary 1913 Edition