sweet pea (plural sweet peas)

1. A flowering plant, Lathyrus odoratus, grown for its bright colours and sweet fragrance.
   • 1842, [Katherine] Thomson, chapter IX, in Widows and Widowers. A Romance of Real Life., volume III, London: Richard Bentley, […], →OCLC ↗, page 162 ↗:

     No one had such pinks as he had; his sweet-william was unrivaled,—he had only half a dozen geraniums, but then they were such geraniums,—the cottage, once an unsightly little mass of lath and plaster, was now besprinkled with roses; and then, his sweet peas were in blossom, and, fortunately for him who had not much to do, they required a great deal of sticking and tying.

2. (colloquial) A term of endearment for something sweet or lovely; a child or an intimate partner, for example.

• French: pois de senteur
• German: Duftwicke, einjährige Duftwicke, Edelwicke, duftende Platterbse
• Italian: pisello odoroso
• Portuguese: ervilha-de-cheiro
• Russian: душистый горошек
• Spanish: guisante de olor