Geology. Of a stratum, rock, etc.: deposited or emplaced later than adjacent strata; spec. intrusive (now rare).

spec. Geology. = intrusive, adj. 2b.

Geology. Of an igneous rock: Forced, while in a state of fusion, into cavities or fissures of other rocks.

Developed or growing upwardly or inwardly.

relating to secretion.

Designating the intrusion of innumerable narrow, more or less parallel, sheets or tongues of magma into the bedding of rocks. Also as adv.