ETYM Pref. inter- + mediate: cf. French intermédiat.
Lying between two extremes in time or space or degree.
Of the stage of education and schools between elementary and secondary including middle grades centering on 5 through 7; SYN. middle.
Množina: intermediates
A substance formed during a chemical process before the desired product is obtained.
1. Intervene, interpose
2. To act as an intermediate