The term 'Mater (Former School)' can be summarized as the Latin word for 'mother, ' which is also the name of a former school. The crossword solution for this term is 'ALMA, ' which is also the Latin word for 'NOURISHING' or 'KIND.' This former school was founded in 1851 and was located in Philadelphia, Pennsylvania. It was a Catholic school that provided education to both boys and girls. The school closed in 1977 due to financial difficulties.