heliogram
(ˈhiːlɪəʊgræm)
[f. heliograph 4, after telegram.]
A message transmitted by a heliograph (see next, sense 4).
| 1881 Nature XXIV. 176 The sight of those who receive the heliogram gets..soon fatigued. 1897 Ld. Roberts 41 Yrs. India II. li. 225 Brigadier-General Massy was informed in reply to his heliogram, that [etc.]. |