| n. | 1. | (Bot.) A coarse American plant of the Mint family (Monarda punctata). |
| Noun | 1. | horsemint - an annual horsemint of central and western United States and northern Mexico Synonyms: lemon mint, Monarda citriodora |
| 2. | horsemint - tall erect perennial or annual having lanceolate leaves and heads of purple-spotted creamy flowers; many subspecies grown from eastern to southwestern United States and in Mexico Synonyms: Monarda punctata | |
| 3. | horsemint - a coarse Old World wild water mint having long leaves and spikelike clusters of flowers; naturalized in the eastern United States Synonyms: Mentha longifolia |