1. (Astron.) The point of an orbit, as of the moon or a planet, at which it is in conjunction or opposition; -- commonly used in the plural. 2. (Gr. & L. Pros.) The coupling together of different feet; as, in Greek verse, an iambic syzygy. 3. (Zoöl.) (a) Any one of the segments of an arm of a crinoid composed of two joints so closely united th...
