A manner of responding to challenges with quick thinking and improvisation.

A convention whereby Esperanto’s circumflex accents (ĉ, ĝ, ĥ, ĵ, ŝ) are replaced by an h after the letter (ch, gh, hh, jh, sh) and the breve (ŭ) is left out entirely (u), for convenience of typing.

A convention whereby Esperanto’s circumflex accents (ĉ, ĝ, ĥ, ĵ, ŝ, ŭ) are replaced by an x after the non-diacriticked letter (cx, gx, hx, jx, sx, ux), for convenience of typing.

(botany) The structure comprising the roots of a plant.

(aviation) A collection of airports, heliports or other aviation facilities that serve a particular location.

(computing, historical) A type of computer system, now largely obsolete, used to exchange messages and data over a telecommunications network.

An electronic voice-amplification apparatus, usually containing a set of two loudspeakers and a central control unit, used for singing, giving a speech, play-by-play commentary at events, or broadcasting in public areas like in airports, stations, stations.

(neuroanatomy) The part of the autonomic nervous system that raises blood pressure and heart rate, constricts blood vessels, and dilates the pupils when under stress.

(aviation) A collection of radio navigation aids (always including a localizer and glideslope, and often one to three marker beacons as well) used by pilots for approach guidance to a specific airport runway, especially when visibility is limited.

A navigation system that produces hyperbolic lines of position by the measurement of the difference in the time of reception, or the phase, of radio signals from multiple synchronized transmitters at fixed locations.