a. A blue pigment made from powdered lapis lazuli.
b. A similar pigment made synthetically by heating clay, sodium carbonate, and sulfur together.
2. A vivid or strong blue to purplish blue.
1. Of the color ultramarine.
2. Of or from a place beyond the sea.
[From Medieval Latin ultrāmarīnus, from beyond the sea : Latin ultrā, ultra- + Latin marīnus, of the sea (from mare, sea; see mori- in the Appendix of Indo-European roots).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.