(idiomatic, UK, Australia, South Africa, New Zealand, India) Hopefully; said while touching something wooden, to avert superstitious bad luck from what has just been said.

A skunk.

(botany) the vertical and usually axially arranged parenchyma of the xylem that is believed to function chiefly in carbohydrate storage

(biblical) The wood used in the construction of Noah's Ark - currently unidentified.

(idiomatic, US) To take a customary action to ward off some misfortune that is believed to be attracted by a presumptuous statement.

(idiomatic, US) Hopefully; a self-directive to undertake the customary action to ward off bad luck.

The tree Brya ebenus / The wood from the tree, used for making flutes and other musical instruments

A white-flowered woodland plant, Oxalis acetosella. / Any of several other species of the genus Oxalis.

An engineering discipline comprising the production of forest products, such as pulp and paper, construction materials, and tall oil.

(US) An area of land used for the growing of firewood and timber, often as the wooded portion of a farmstead in contrast with arable and pasture portions.