Knife

A knife (plural knives) is a cutting tool with an exposed cutting edge or blade, hand-held or otherwise, with or without a handle. Knife-like tools were used at least two-and-a-half million years ago, as evidenced by the Oldowan tools. Originally made of rock, flint, and obsidian, knives have evolved in construction as technology has, with blades being made from bronze, copper, iron, steel, ceramics, and titanium. Many cultures have their unique version of the knife. Due to its role as humankind's first tool, certain cultures have attached spiritual and religious significance to the knife.

Most modern-day knives follow either a fixed-blade or a folding construction style, with blade patterns and styles as varied as their makers and countries of origin.

Read more about Knife:  Materials, Features, and Construction, Rituals and Superstitions, Legislation, Further Reading

Famous quotes containing the word knife:

    Come, thick night,
    And pall thee in the dunnest smoke of hell,
    That my keen knife see not the wound it makes,
    Nor heaven peep through the blanket of the dark
    To cry, “Hold, hold!”
    William Shakespeare (1564–1616)

    Anna who was mad,
    I have a knife in my armpit.
    When I stand on tiptoe I tap out messages.
    Anne Sexton (1928–1974)

    The plastic surgeon’s knife slashes at time, which may seem to retreat, but then keeps on coming.
    Mason Cooley (b. 1927)