| Answer | Crossword Clue |
|---|---|
| zeroth | being numbered zero in a series |
| zeroth | being numbered zero in a series |
| centroid | the point that may be considered as the center of a one- or two-dimensional figure, the sum of the displacements of all points in the figure from such a point being zero |
| nth | being the last in a series of infinitely decreasing or increasing values, amounts, etc. |
| umteenth | being the last in an indefinitely numerous series |
