To assess the relationship between study time and test scores, we calculated Spearman's rho and observed a moderately positive association.

The experimentalists observed the decay patterns of the rho meson to test predictions of strong interaction models.

When trying to factor a large composite number, we often use Pollard's rho algorithm because it is particularly effective at finding small factors.

We spent a windy afternoon watching the surfers off Rhosneigr before grabbing fish and chips.

I spent a memorable weekend visiting Rhosllanerchrugog and exploring its local mining history.