(organic chemistry) An unsaturated fatty acid cis-6-octadecenoic acid found in many members of the family Apiaceae (e.g. parsley seed oil); it is a positional isomer of oleic acid, the double bond being in position 6 instead of 9.

(archaeology) An impression of part of a human or animal body incised in rock

(archaeology) Any roughly spherical artefact made of stone.

plural of petrosomatoglyph

plural of petrosphere

Of or pertaining to petroselinic acid or its derivatives.

A surname from Armenian, equivalent to English Peterson.

A state whose wealth stems from the sale of oil.

plural of petrostate

Of great hardness; petrous. / (anatomy, relational) Of, pertaining to, or located near the petrous part of the temporal bone or the capsule of the inner ear.