ORNAMENTAL
cosmetic, decorative, ornamental
(adjective) serving an esthetic rather than a useful purpose; “cosmetic fenders on cars”; “the buildings were utilitarian rather than decorative”
ornamental
(noun) any plant grown for its beauty or ornamental value
Source: WordNet® 3.1
Etymology
Adjective
ornamental (comparative more ornamental, superlative most ornamental)
Serving as an ornament; having no purpose other than to make more beautiful.
Synonyms: beautifying, embellishing, decorative
Noun
ornamental (plural ornamentals)
An ornamental plant.
Source: Wiktionary
Or`na*men"tal, a. Etym: [Cf. F. ornemental.]
Definition: Serving to ornament; characterized by ornament; beautifying;
embellishing.
Some think it most ornamental to wear their bracelets on their
wrists; others, about their ankles. Sir T. Browne.
Source: Webster’s Unabridged Dictionary 1913 Edition