The technical notion of sensitive dependence on initial conditions in chaos theory.

The yellow wood anemone.

plural of buttercup anemone

A non-serrated or unilaterally serrated table knife with a dull edge and rounded point, designed for spreading butter on a piece of bread without tearing it.

Of a collar, able to be buttoned down to the shirt, as over a necktie. / (idiomatic) Serious; staid; businesslike. / (idiomatic) Conservative; conventional; unimaginative.

A shirt with a button-down collar

A button on a corset.

A North American walnut tree, Juglans cinerea. / The wood or bark of this walnut tree. / The nut of this walnut tree. / A dye made from the fruit of this walnut tree. / The souari nut.

A short, hand-written communication to thank someone who has recently provided the writer with hospitality, usually dinner or an overnight visit.

Any of a line of preset buttons on a car radio used to select the station to be listened to; pressing one releases the others