Heliograph and Sign

Heliograph verb - Signal by means of a mirror and the using the sun's rays.

Sign and heliograph are semantically related. in guide topic. In some cases you can use "Sign" instead the word "Heliograph" as a noun or a verb.

Sign verb - To write one's name on (as a document).

Heliograph and sign are semantically related. You can use "Heliograph" instead a noun "Sign".

Nearby Words: signify, signed, signature, signing, signboard