eclipse (solar, lunar, etc.)
encroachment; erosion; corrosion
corrosion; etching; action of acid; rot; rust; erosion
total eclipse of the Moon
dental caries; tooth decay
maximum eclipse; maximum obscuration
glacial scouring; glacial erosion; glacial abrasion
damage to crops by vermin (esp. insects); pest damage
an anti-corrosive (agent)
occultation (by the Moon)
total eclipse (solar or lunar); totality
protection against corrosion
tooth erosion; acid erosion; chemical abrasion