preemergent

preemergent
/pree'i merr"jeuhnt/, adj. Hort.
1. of or pertaining to seedlings before they emerge or appear above ground: a preemergent weed-killer.
n.
2. a preemergence chemical, as a herbicide.
Also, pre-emergent.
[1955-60; PRE- + EMERGENT]

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Universalium. 2010.

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