knot

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knot

1
1. a protuberance or lump of plant tissues, such as that occurring on the trunks of certain trees
2. 
a. Pathol a lump of vessels or fibres formed in a part, as in a muscle
b. Anatomy a protuberance on an organ or part
3. a unit of speed used by nautical vessels and aircraft, being one nautical mile (about 1.15 statute miles or 1.85 km) per hour
4. one of a number of equally spaced knots on a log line used to indicate the speed of a ship in nautical miles per hour

knot

2
a small northern sandpiper, Calidris canutus, with a short bill and grey plumage

knot

A bright compact feature particularly in radio and X-ray jets and in supernova remnants.

Knot

1. Hard, cross-grained section in a piece of timber, where a branch had formed in the trunk of the tree.
2. In medieval architecture, a bunch of leaves, flowers, or a similar ornament, such as bosses at the intersection of ribs, and bunches of foliage in capitals; an ornamental design resembling cords that are interlaced.
See also: Ornament

Knot

 

in navigation, a unit used to define the speed of a vessel. One knot is equal to 1 nautical mile per hr, 1.852 km per hr, or 0.5144 m per sec. The term “knot” originated in the days of sailing fleets, when a ship’s speed was determined by how quickly a log line played out from a log reel. The log line was divided into segments of 50 feet 8 inches (1/120 of a nautical mile), and the segments were marked by knots in the line. The rate at which the line unreeled was measured for 30 seconds (1/120 of an hour). The number of knots (segments) unreeled in 30 seconds corresponded to the ship’s speed in nautical miles per hour, that is, in knots.


Knot

 

a temporary connection made between two ropes or between a rope and some object. Knots are tied in such a way that they become more secure as tension on the rope increases. The loops of a knot loose their grip when tension on the rope is decreased, which makes it easier to untie the knot. Different types of knots are used for different purposes, for example, to tie together two ropes of the same or different thickness, to fasten ropes to moorings, or to hoist long, smooth objects.

What does it mean when you dream about a knot?

A knot is an obvious symbol of constraints and restrictions on one’s freedom of thought, feelings, or actions, indicating a difficult situation that needs to be untied. Anxieties about getting married (“tying the knot”) are sometimes denoted by this dream symbol. More positively, a knot can symbolize control, and having something “all wrapped up.” (See also Necktie).

knot

[nät]
(computer science)
(materials)
A scar on lumber marking a place where a branch grew out of the tree truck.
(mathematics)
In the general case, a knot consists of an embedding of an n-dimensional sphere in an (n + 2)-dimensional sphere; classically, it is an interlaced closed curve, homeomorphic to a circle.
(organic chemistry)
A chiral structure in which rings containing 50 or more members have a knotlike configuration.
(physics)
A speed unit of 1 nautical mile (1.852 kilometers) per hour, equal to approximately 0.51444 meters per second.

knot

1. In medieval architecture, a bunch of leaves, flowers, or similar ornament, as the bosses at the intersections of ribs, and bunches of foliage in capitals.
2. An ornamental design resembling cords which are interlaced.
3. The hard, cross-grained mass of wood formed in a trunk at the place where a branch joins the trunk.
4. In fabric construction, the presence of an imperfection that will cause a surface irregularity.

knot

A speed of 1 NM/h, 1.1508 statute miles/hour, 1.852 km/h, or 0.5144 m/s. It is the most common measure of speed used in aerial navigation.
References in periodicals archive ?
Many other beautiful photographs illustrate the life of the rufa red knots.
The beaches from Balneario Pinhal to Mostardas in the State of Rio Grande do Sul (southern Brazil) are used by large numbers of shorebirds as stopover and wintering areas, especially Sanderlings, White-rumped Sandpipers, and Red Knots.
These species include Black Skimmer, Clapper Rail, Least Tern, Piping Plover, Red Knot, Sanderling, Seaside Sparrow, and Wilson's Plover.
states in management efforts to protect the Red Knots at Delaware Bay
Any size or number of round red knots, splits within the knot are acceptable, splits around the knot are acceptable up to 2/3 of the circumference of the knot.
If the red knots cannot find shelter, rest and a sure source of food at each stopover, then they may never make it back to the Arctic.
For an endangered species like the Red Knot, the more we can learn about its survivability and migration routes, the better chance we have of helping to protect this bird.
We obtained hematologic and plasma biochemistry values for adult, long-distance migrant red knots at their southernmost wintering site in Rio Grande (Tierra del Fuego, Argentina) and at the first stopover site in San Antonio Oeste (Rio Negro, Argentina).
Their eggs are vital to shorebird populations, particularly red knots.
Atlanta Audubon Society - to develop a Georgia Important Bird Area conservation program to benefit American oystercatchers, red knots, and loggerhead shrikes.
Red Knots (Calidris canutus), a Holarctic breeding shorebird, have a relatively large, albeit poorly-known breeding range in the Nearctic (Harrington 2001).
Green knots are concentrated in the top logs and red knots at the top of the butt logs and first middle logs.