layered structure
31Han Purple and Han Blue — Infobox Color|title=Han Purple|textcolor=white hex=5218FA r= 82|g= 24|b=250 c= |m= |y= |k= h= 260|s= 97|v= 47 source= [http://images.google.com/imgres?imgurl=http://www.spacedaily.com/images/microscopic han purple sm.jpg… …
32Molybdenum disulfide — Molybdenum disulfide …
33glacier — glaciered, adj. /glay sheuhr/, n. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of… …
34Gastrulation — of a diploblast: The formation of germ layers from a (1) blastula to a (2) gastrula. Some of the ectoderm cells (orange) move inward forming the endoderm (red). Gastrulation is a phase early in the embryonic development of most animals, during… …
35Arthropod exoskeleton — Arthropods are covered with a tough or resistant exoskeleton, which may be mineralised or constructed of a tough polymer such as chitin. This external skeleton is moulted as the organism grows.Microscopic structureA typical arthropod exoskeleton… …
36Crystal habit — This article is about the descriptive term used in mineralogy. For the addictive drug, see crystal methamphetamine. Pyrite sun (or dollar) in laminated shale matrix. Between tightly spaced layers of shale, the aggregate was forced to grow in a… …
37clay mineral — any of a group of hydrous aluminum silicate minerals, as kaolinite, illite, and montmorillonite, that constitute the major portion of most clays. [1945 50] * * * Any of a group of important hydrous aluminum silicates with a layered structure and… …
38Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
39Cerebellum — This article is about the smaller region in the lower part of the brain. For the large region of the brain, see Cerebrum. Brain: Cerebellum A human brain, with the cerebellum colored in purple …
40Retina — For the Retina display in the iPhone 4, see iPhone 4#Display. Retina Right human eye cross sectional view. Courtesy NIH National Eye Institute. Many animals hav …
