spiral stem

См. также в других словарях:

• Spiral computed tomography — Diagnostics MeSH D036542 Spiral computed tomography is a computed tomography,[1] technology involving movement in a spiral …   Wikipedia

• stem — stem1 stemless, adj. stemlike, adj. /stem/, n., v., stemmed, stemming. n. 1. the ascending axis of a plant, whether above or below ground, which ordinarily grows in an opposite direction to the root or descending axis. 2. the stalk that supports… …   Universalium

• spiral — [16] Spiral comes via French spiral from medieval Latin spīrālis ‘coiled’, a derivative of Latin spīra. This in turn went back to Greek speira ‘coil’. English also acquired the noun, as spire [16], which is used for the ‘tip of a spiral shell’.… …   The Hutchinson dictionary of word origins

• spiral — [16] Spiral comes via French spiral from medieval Latin spīrālis ‘coiled’, a derivative of Latin spīra. This in turn went back to Greek speira ‘coil’. English also acquired the noun, as spire [16], which is used for the ‘tip of a spiral shell’.… …   Word origins

• Spiral axis — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

• genetic spiral — noun : a spiral formed by passing a line through the point of insertion of each leaf on a stem from the lowest to the highest * * * genetic spiral noun (botany) A hypothetical line through the centres of successive leaf primordia at the shoot… …   Useful english dictionary

• rug and carpet — Any decorative textile normally made of a thick material and intended as a floor covering. Floor coverings made of plaited rushes date from the 5th or 4th millennium BC. Carpets were first made in central and western Asia as coverings for earthen …   Universalium

• dextrorse — adj. rising towards the right, esp. of a spiral stem. Etymology: L dextrorsus (as DEXTRO ) …   Useful english dictionary

• sinistrorse — adj. rising towards the left, esp. of the spiral stem of a plant. Etymology: L sinistrorsus f. sinister left + vorsus past part. of vertere turn …   Useful english dictionary

• ear, human — ▪ anatomy Introduction       organ of hearing and equilibrium that detects and analyzes noises by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium).  The human ear, like …   Universalium

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium