cross section noun
plural ∼ -tions 1 : a view or drawing that shows what the inside of something looks like after a cut has been made across it [count] ▪ a detailed cross section of the human brain [noncount] ▪ The drawing showed the human brain in cross section. 2 [count] : a small group that includes examples of the different types of people or things in a larger group
▪ The class surveyed a cross section of the student body. ▪ The people in our neighborhood are/form a representative cross section of American society.
▪ The class surveyed a cross section of the student body. ▪ The people in our neighborhood are/form a representative cross section of American society.
— cross–sec·tion·al 
/ˈkrɑ:sˈsɛkʃənəl/ adjective
▪ a cross-sectional view of the brain
/ˈkrɑ:sˈsɛkʃənəl/ adjective ▪ a cross-sectional view of the brain
