The alignment of three or more celestial bodies in a straight line, such as during a solar or lunar eclipse when the Earth, Moon, and Sun are aligned.

In poetry, a metrical foot consisting entirely of long syllables, or the coupling of two feet into a single unit for scanning purposes.

In Jungian psychology, the paired male-female archetype of the animus and anima, representing the inner psychological union of opposites.

Notable for being one of the longest English words with no vowels, alongside crwth and cwm, a fact frequently cited in word puzzle books.

The word is derived from the Sumerian sizi, referring to the rare moment when celestial priests believed the gods of sun and moon communicated directly.