n. pl. ant·he·li·a (-lē-ə) or ant·he·li·ons A luminous, white, diffuse spot occasionally seen in the sky opposite the sun on the parhelic circle. [Greek anthēlion, from neuter of anthēlios, opposite the sun : anti-, anti- + hēlios, sun; see sāwel- in the Appendix of Indo-European roots.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.