the.com/chanukiah

A menorah with eight equal flames plus one bossy supervisor candle.

means A nine-branched candelabrum lit during Hanukkah, with eight branches of equal height for each night of the holiday and one raised or set-apart branch holding the shamash, the 'helper' candle used to light all the others.

from The word is Hebrew, built from 'chanukah' (dedication — the holiday it serves) plus the suffix '-iah/-iyyah' that marks a vessel or instrument for doing something, so it literally reads as 'the Hanukkah-thing.' It's a deliberately specific cousin of the older, more general 'menorah' (simply 'lamp' or 'lampstand' in Hebrew, the word used for the seven-branched Temple lamp), coined to distinguish the nine-branched holiday candelabrum from its ancient seven-branched ancestor.

not just menorah
technically a menorah is any multi-branched candelabrum
the ninth branch
shamash candle lights all others, never counted
height rule
shamash must sit higher or lower than the eight
nightly math
you add one flame per night, working backward
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