The Collaborative International Dictionary
Allineation
Allineation \Al*lin`e*a"tion\, Alineation \A*lin`e*a"tion\, n.
Alignment; position in a straight line, as of two planets
with the sun.
--Whewell.
The allineation of the two planets.
--C. A. Young.
Wiktionary
allineation
alt. alignment; position in a straight line, as of two planets with the sun n. alignment; position in a straight line, as of two planets with the sun