I think thereâs fear of intimidation, harassment being legitimized by the fact that there is a high rate of crime, especially among young black men, Williams said. No. 1 cause of death, young black men 15 to 34 â murder.
(plural convolutions). 1  Something that is folded or twisted. 2  Any of the folds on the surface of the brain. 3  The shape of something rotating; a vortex. ( 4 mathematics) A form of moving average. ( 5 computing) A function which maps a tuple of sequences into a sequence of tuples.
A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil.Concretions are often ovoid or spherical in shape, although irregular shapes also occur.he word 'concretion' is derived from the Latin con meaning 'together' and crescere meaning 'to grow'. Concretions form within layers of sedimentary strata that have already been deposited. They usually form early in the burial history of the sediment, before the rest of the sediment is hardened into rock.