BIENNIAL
biennial, two-year
(adjective) having a life cycle lasting two seasons; “a biennial life cycle”; “parsnips and carrots are biennial plants often grown as annuals”
biennial, biyearly
(adjective) occurring every second year; “they met at biennial conventions”
biennial
(noun) (botany) a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season
Source: WordNet® 3.1
Etymology
Adjective
biennial (not comparable)
Happening every two years.
Lasting for two years.
Synonyms
• biennary (uncommon); biannual (proscribed)
Noun
biennial (plural biennials)
A plant that requires two years to complete its life-cycle, germinating and growing in its first year, then producing its flowers and fruit in its second year, after which it usually dies.
Source: Wiktionary
Bi*en"ni*al, a. Etym: [L. biennalis and biennis, fr. biennium a space
of two years; bis twice + annus year. Cf. Annual.]
1. Happening, or taking place, once in two years; as, a biennial
election.
2. (Bot.)
Definition: Continuing for two years, and then perishing, as plants which
form roots and leaves the first year, and produce fruit the second.
Bi*en"ni*al, n.
1. Something which takes place or appears once in two years; esp. a
biennial examination.
2. (Bot.)
Definition: A plant which exists or lasts for two years.
Source: Webster’s Unabridged Dictionary 1913 Edition