sol-lunaradj.

1790 F. Balfour (title) Treatise on putrid intestinal remitting fevers, in which the laws of the febrile state and sol-lunar influence explain the forms, crises, etc., of fevers.

1805 F. Balfour in Asiatick Researches 8 10 Exacerbations of sol-lunar power in exciting and reiterating paroxysms.

1936 J. A. Knight Mod. Angler xviii. 198 It is well to use a descriptive term or word instead of referring to ‘inland tides’ or ‘the conditions which cause tides’. For this purpose the word ‘Solunar’ has been coined. Solunar..may be defined as follows: The time at which the conditions which cause ocean tides (i.e. the pull of the sun and the moon) pass the longitudinal meridian of any given point is the Solunar period at that point.

1962 E. Bruton Dict. Clocks & Watches 162 ‘Solunar’ dial, daily tidal times, as shown on some wrist-chronographs and used in conjunction with ‘solunar tables’ (J. Alden Knight) to forecast feeding times of fish and game for sportsmen.

1971 Nature 31 Dec. 537/2 The phase lag in the incidence of large earthquakes with respect to overhead position of the Sun and Moon is coincident with the imposition of horizontal force in such a direction and sense as to increase accumulated shear strain if this is due to the solunar torque.