root of thread
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thread height — The distance from root to thread crest, measured perpendicular to the axis of the thread … Dictionary of automotive terms
thread — (n.) O.E. þræd fine cord, especially when twisted (related to þrawan to twist ), from P.Gmc. *thrædus (Cf. M.Du. draet, Du. draad, O.H.G. drat, Ger. Draht, O.N. þraðr), from suffixed form of root *thræ twist (see THROW (Cf … Etymology dictionary
Root nodule — Cross section though a soybean (Glycine max Essex ) root nodule. The bacterium, Bradyrhizobium japonicum, colonizes the roots and establishes a nitrogen fixing symbiosis. This high magnification image shows part of a cell with single bacteroids… … Wikipedia
root — I. /rut / (say rooht) noun 1. a part of the body of a plant which, typically, develops from the radicle, and grows downwards into the soil, fixing the plant and absorbing nutriment and moisture. 2. a similar organ developed from some other part… …
root — The lowest point of a screw thread. The opposite is crest. See thread root veeder root … Dictionary of automotive terms
thread root — The lowest point of a screw thread, where the thread joins the body. It is opposite of crest … Dictionary of automotive terms
thread crest — The highest point of a screw thread, opposite the root … Dictionary of automotive terms
Screw 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… … Wikipedia
National pipe thread — Threaded pipe and elbow. The pipe has a male NPT thread, while the elbow s is female. National Pipe Thread Tapered Thread (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings. The taper rate for all NPT threads is 1⁄16 … Wikipedia
infection thread — A tubular structure formed during the infection of a root by nitrogen fixing bacteria. The bacteria enter the root by way of the infection thread and stimulate the formation of the root nodule … Dictionary of microbiology
depth of thread — The distance from the thread crest to root measured perpendicular to the axis of the thread … Dictionary of automotive terms
