- an aggregate of soil particles held together by various constituents of organic matter: macroaggregates as a rule are larger than 250 micrometers in diameter and are usually found in untilled or otherwise undisturbed soil.
- a visible aggregate of biological molecules.
- to collect into a relatively large aggregate: By macroaggregating certain molecules, we can facilitate a number of medical applications.
- to combine and form a relatively large aggregate: It may seem that all is motionless beneath the surface, but particles of earth, excretions of worms, filaments of roots, and bits of fungus are very busy macroaggregating.
