crys'tal

[G. krystallos, clear ice.] One of the figures of symmetrical shape a umed by certain salts and other chemical compotmds. asth'ma c, Charcot*-Leyden crystal, ear c, otolith, kniferest c, a crystal of ammoniomagnesian phosphate. sperm c, sper'min c, a crystal of sperm in phosphate found in the semen probably identical with Boettcher's or Charcot's crystals.