planet-x
noun Astronomy.
a planet (beyond the orbit of the dwarf planet Pluto) whose existence has been hypothesized but not confirmed.
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Planet-x
is always a great word to know.
So is quincunx. Does it mean:
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a scrap or morsel of food left at a meal. |
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