rock martin
noun
Any of several martins and swallows that frequent cliffs, rocky outcrops, etc.; specifically (originally) the crag martin, Ptyonoprogne rupestris, or (in later use) the dark brown P. fuligula of Africa, which also nests on man-made structures.
Origin
Mid 19th century; earliest use found in The Penny Cyclopaedia.
- lower second
- lower sixth
- lower the boom on
- lower the tone
- lower working class
- lower world
- lowest common denominator
- lowest common multiple
- Lowestoft
- low-fat
- low feeding
- low fermentation
- low fever
- low-fi
- low fidelity
- low-field
- low-five
- low-flash
- low-floor
- low-flung
- low-flush
- low-flux
- low-fly
- low-flyer
- low-flying