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he·li·o·graph

(hēlē-ə-grăf′)

1. A device for transmitting messages by reflecting sunlight.

2. A device capable of imaging the surface and outer regions of the sun.

v. he·li·o·graphed, he·li·o·graph·ing, he·li·o·graphs

v.tr.

To send (a message) by heliograph.

v.intr.

To send a heliograph.

he′li·ogra·pher (-ŏgrə-fər) n.

he′li·o·graphic adj.

he′li·ogra·phy (-ŏgrə-fē) n.

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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