gemination

• Wherever two bands cross such areas would be sure to exist, and in almost every instance of crossing the telescope actually shows them As to the gemination or duplication of many of the lines which, at the beginning of the season, appear single, it may be suggested that, in the course of the development of the vast irrigation system of the planet parallel bands of cultivation have been established, one receiving its water supply from the canals of the other, and consequently lagging a little behind in visibility as the water slowly percolates through the soil and awakens the vegetation. —  Other Worlds Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries
• The gemination is not necessarily confined only to the canals, but tends to be produced also in the lakes. —  The Certainty of a Future Life in Mars
• In these cases the gemination is naturally short and does not exceed the limits of the original lake The gemination is not shown by all at the same time, but when the season is at hand it begins to be produced here and there, in an isolated, irregular manner, or at least without any easily recognizable order. —  The Certainty of a Future Life in Mars
• In many canals (such as the Nilosyrtis, for example), the gemination is lacking entirely, or is scarcely visible. —  The Certainty of a Future Life in Mars
• [D The observation of the gemination is one of the greatest difficulty, and can only be made by an eye well practiced in such work, added to a telescope of accurate construction and of great power. —  The Certainty of a Future Life in Mars

Allen's Synonyms and Antonyms