A gradual loss of hair, common in humans, especially males.

A pole-mounted steel board, usually whitewashed, used by shotgunners to assess the spread of the shot.

(linguistics) A string-matching pattern based on text tokens and syntactic structure.

(US, television) A test signal, typically broadcast at times when the transmitter is active but no program is being broadcast.

(aviation) A path taken by an aircraft waiting to land. / (idiomatic) Any failure to advance; useless or unproductive activity.

(music) Foreground details, such as rhythmic units or rhythmic gestures, as projected against a background metric structure.

(anatomy) All the features of the skin, feathers, etc. of an animal that are arranged in designs; especially, the configuration of epidermal ridges (dermatoglyphics) characteristic of primates.

(architecture, computing, design) A formal way of documenting a general reusable solution to a design problem in a particular field of expertise.

(physics) the pattern of lines or spots produced by diffraction; especially the two-dimensional pattern produced by X-ray diffraction that may be used to determine the structure of a crystal or of a crystalline compound.

(computing, object-oriented computing) A structural design pattern in which an object contains no pointers to data type methods.