cone-worm unit
21Ecology — For other uses, see Ecology (disambiguation). Ecology …
221999 — Year 1999 (MCMXCIX) was a common year starting on Friday (link will display full 1999 Gregorian calendar).The year 1999 was designated the International Year of Older Persons by the United Nations. It was the Year of the Rabbit in the Chinese… …
23Lathe — A lathe (pronEng|ˈleɪð) is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has… …
24Screw thread — Internal and external threads illustrated using a common nut and bolt. The screw and nut pair can be used to convert torque into linear force. As the screw (or bolt) is rotated, the screw moves along its axis through the fixed nut, or the non… …
25Babylonia — • Includes geography, history, and biblical references Catholic Encyclopedia. Kevin Knight. 2006. Babylonia Babylonia † …
26Bird strike — A bird strike (sometimes birdstrike, bird hit, or BASH (Bird Aircraft Strike Hazard)) in aviation is a collision between an airborne animal (usually a bird) and a man made vehicle, especially aircraft. It is a common threat to aircraft safety,… …
27Holographic Versatile Disc — Infobox media name = Holographic Versatile Disc caption =Picture of an HVD by Optware type = Ultra high density optical disc encoding = MPEG 2, MPEG 4 AVC (H.264), and VC 1 capacity = theoretically up to 3.9 TB read = write = standard = owner =… …
28photochemical reaction — Chemical reaction initiated by absorption of energy in the form of visible (light), ultraviolet, or infrared radiation. Primary photochemical processes occur as an immediate result, and secondary processes may follow. The most important example… …
29Italy — • In ancient times Italy had several other names: it was called Saturnia, in honour of Saturn; Enotria, wine producing land; Ausonia, land of the Ausonians; Hesperia, land to the west (of Greece); Tyrrhenia, etc. The name Italy, which seems to… …
