concave area
71List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
72Brown bear — Temporal range: Late Pleistocene – Recent A Kodiak bear (U. arctos middendorffi) in Katmai National Park, Alaska Conservation status …
73Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
74Meander — For other uses, see Meander (disambiguation). A hypothetical stream bed following a tilted valley. The maximum gradient is along the down valley axis represented by a hypothetical straight channel. Meanders develop, which lengthen the course of… …
75Fillet (mechanics) — In mechanical engineering, a fillet (pronEng|ˈfɪlɨt) is a concave easing of an interior corner of a part design.Applications* Stress concentration is a problem of load bearing mechanical parts which is reduced by employing fillets on points and… …
76Red fox — For other uses, see Red fox (disambiguation). Red fox Temporal range: Mid Pleistocene–Recent European red fox (V. v. crucigera) Conservation status …
77Microlith — For the catalytic reactor, see Microlith (catalytic reactor). Backed edge bladelet A microlith is a small stone tool usually made of flint or chert and typically a centimetre or so in length and half a centimetre wide. It is produced from either… …
78Capital (architecture) — Ionic capital, from the temple of Athena Polias, Priene, Ionia, in a 19th century engraving In architecture the capital (from the Latin caput, head ) forms the topmost member of a column (or pilaster). It mediates between the column and the load… …
79Tile — For other uses, see Tile (disambiguation). Decorative tilework in Sheikh Lotf Allah Mosque, Isfahan, Iran early 17th century A tile is a manufactured piece of hard wearing material such as ceramic, stone, metal, or even glass. Tiles are generally …
80Oldsmobile 88 — Oldsmobile Eighty Eight Manufacturer General Motors Production 1949–1999 Class Full siz …
