Rimae

Part of speech: noun

Pronunciation: /ˈɹaɪˌmi/

Definitions

1. A type of channel or groove found in geological formations, typically shaped by erosion or other natural processes
2. Referring to the cracks or openings in a surface that can affect its overall integrity and appearance
3. Describing narrow fissures in earth or rock, often formed over long periods through various environmental conditions

Etymology: "Rimae" is the plural of "rima," a term used in astronomy and geology for narrow cracks or fissures on a planetary surface. The English word was borrowed directly from Latin "rīma," meaning a cleft, crack, fissure, or chink. The Latin noun is the source of the plural form that English keeps when writing about several such features at once. The Latin word belongs to a family of ideas about splitting open, and its meaning stayed close to the physical sense of a gap in solid material. English speakers adopted it as a technical term, so the word carries little of the everyday, figurative life that many borrowed words acquire. Its sense today is the same as its original one: a thin split in a surface, whether on the Moon or on a rock.