olemus
Merriam-Webster, adj:
4a: close to the lower limit of qualification, acceptability, or function : barely exceeding the minimum requirements
/ /a semiliterate person of marginal ability
4b(1): having a character or capacity fitted to yield a supply of goods which when marketed at existing price levels will barely cover the cost of production
// marginal land
4b(2): of, relating to, or derived from goods produced and marketed with such result
// marginal profits

näiteid
marginal costs -- piirkulud
marginal loss -- piirkahjum
marginal majority -- vähene enamus
marginal price -- marginaalhind
marginal profit -- piirkasum
marginal rate -- piirmäär
marginal relief -- maksu piiraland
marginal yield -- piirtulu