to change colour
71Ionochromism — Ionochromic materials, similar to photochromic, thermochromic and other chromic materials, alter colour in the presence of a factor and reverse to their initial state when the factor is removed. The factor which causes colour change in… …
72treated gem — ▪ gemology also called Treated Stone, genuine gem material whose colour has been artificially enhanced or produced to increase the value of the stone; staining, heat treatment, and irradiation are among the treatments used.… …
73Crane (bird) — Cranes Indian Sarus Cranes Grus antigone antigone Scientific classification Kingdom …
74Citrus — For other uses, see Citrus (disambiguation). Citrus Sweet Orange (Citrus × sinensis cultivar) Scientific classification Kingdom …
75Cod fisheries — Atlantic cod Pacific cod Cod f …
76Frog — For other uses, see Frog (disambiguation). Frogs Temporal range: Triassic–present …
77celadon — /sel euh don , dn/, n. 1. any of several Chinese porcelains having a translucent, pale green glaze. 2. any porcelain imitating these. 3. a pale gray green. adj. 4. having the color celadon. [1760 70; named after Céladon, name of a character in L… …
78nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… …
79Paxillus involutus — Scientific classification Kingdom: Fungi Division …
80turn — verb 1》 move in a circular direction wholly or partly around an axis. ↘twist or sprain (an ankle). 2》 move into a different position, especially so as to face the opposite direction. ↘change or cause to change direction. ↘(of the… …
