It is found that the direction of the moon's equator remains nearly invariable with respect to the plane of the orbit, and therefore revolves with that plane in a nodal period of 18.6 years.
On germination it gives rise to a row of cells in which short (nodal) and long (internodal) cells alternate.
Owing to the action of the moon on the earth, as it performs its monthly revolution in an orbit slightly inclined to the ecliptic, the centre of the earth itself deviates from the plane of the ecliptic in a period equal to that of the nodal revolution of the moon.
To the tone f ' ' correspond 6 nodal meridians.
metastasisnts with regional lymph node metastases treated by nodal resection, it was less likely to recur than did radiotherapy.