(geology) A long chain of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries.

plural of serval

An advance or movement made from one foot to the other; a pace. / A rest, or one of a set of rests, for the foot in ascending or descending, as a stair, or a rung of a ladder.

Provoking pity, compassion, or sympathy. / (obsolete) Showing devotion to God. / (obsolete) Showing compassion. / (obsolete) Of little importance or value.