A plant (Hyssopus officinalis). The leaves have an aromatic smell, and a warm, pungent taste.
- A woody Eurasian plant (Hyssopus officinalis) having spikes of small blue flowers and aromatic leaves used in perfumery and as a condiment.
- Any of several similar or related plants.
- An unidentified plant mentioned in the Bible as the source of twigs used for sprinkling in certain Hebraic purificatory rites.