delphinium [dɛɫˈfɪnɪəm] noun2 •A cultivated plant, belonging to the genus Delphinium, with tall blue-colored spikes containing flowers; a larkspur.The engagement photos were set in a leafy bower festooned with pink and white roses, anemones, lilies and delphinium, like something straight out of an enchanted garden. — 2025 •A shade of blue, named for the flowers. formsdelphinia · delphiniums