The American Heritage® Dictionary of the English Language, 4th Edition
n. A plant of the genus Delphinium, especially any of several tall cultivated varieties having palmate leaves and long racemes of showy, variously colored spurred flowers. Also called larkspur.
n. A cultivated plant, belonging to the genus Delphinium, with tall blue-colored spikes containing flowers.
n. A shade of blue, named for the flowers.
The Century Dictionary and Cyclopedia
n. An extensive genus of the natural order Ranunculaceæ, consisting of annual or perennial herbaceous plants, with usually blue, purple, or white flowers.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any plant of the genus Delphinium having palmately divided leaves and showy spikes of variously colored spurred flowers; some contain extremely poisonous substances
Word Usage
"[3] The delphinium flower resembles the bottle-like nose of a dolphin; as a result, delphinium comes from the Greek word delphis, meaning "dolphin.""