Phanerozoic /fan-ər-ə-zōˈik/ (geology)

Of or belonging to the eon from the start of the Cambrian period (540 million years ago) to the present (also noun)

• on the lines of
• on the long side
• on the loose
• on the make
• on the map
• on the march
• on the market
• on the mat
• on the mend
• on the money
• on the move
• on the nail
• on the nod
• on the nose
• on the off chance
• on the off-chance
• on the offchance
• on the one hand
• on the other hand
• on the outer
• on the outs
• on the outs with
• on the parish
• on the part of
• on the pavement