from an unused root (probably identical with that of שָׁבָה through the idea of subdivision into flashes or streamers (compare שָׁבִיב) meaning to flame; a gem (from its sparkle), probably the agate; agate.
ordinal from שָׁלוֹשׁ; third; feminine athird (part); by extension, a third (day, year or time); specifically, a third-story cell); third (part, rank, time), three (years old).