the.com/weed killer
Selective murder dressed as lawn care — kills the dandelion, spares the grass.
means A chemical (herbicide) formulated to kill unwanted plants, often selectively, while leaving desired plants like grass or crops unharmed.
from Straightforward compound of 'weed' (a wild plant growing where it's not wanted — itself from Old English 'weod', of uncertain deeper roots) plus 'killer'. The science behind it, though, has a real story: modern selective herbicides emerged from research in the 1940s into plant growth hormones, when chemists found that synthetic compounds mimicking auxin could make broadleaf plants grow themselves to death while grasses shrugged it off. So the word is plain English, but the product behind it was a genuine mid-20th-century chemical breakthrough — one that also, less happily, became the basis for wartime defoliants.
- the trick
- exploits plant biology differences, not brute force
- glyphosate
- blocks an enzyme plants need, humans lack
- timing matters
- hits actively growing weeds, not dormant ones