a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep; "he believes that narcolepsy is attributable to an inability to suppress REM sleep during waking"
a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explode
notion consisting of a narrow strip of fine material used for trimming
a long strip of inked material for making characters on paper with a typewriter
any long object resembling a thin line; "a mere ribbon of land"; "the lighted ribbon of traffic"; "from the air the road was a grey thread"; "a thread of smoke climbed upward"
the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities
a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system
an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation