from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
STILLICIDIUM, civ. law. The rain water that falls from the roof or eaves of
a house by scattered drops. When it is gathered into a spout it is called
flumen.
2. Without the constitution of one or other of these servitudes, no
proprietor can build so as to throw the rain that falls from his house
directly on his neighbor's grounds; for it is a restriction upon all
property, nemo protest immitere in alienum; and he who in building breaks
through that restraint, truly builds on another man's property; because to
whomsoever the area belong's, to him also belongs whatever is above it:
cujus est solum, ejas est usque ad caelum. 3 Burge on the Conf. of Laws,
405. Vide Servitus Stillicidii. Inst. 3, 2, 1; Dig. 8, 2, 2.