### aggregation:

Aggregate
* Many aggregates are actually the fecal pellets of earthworms and other invertebrates.
* also form in axons, which degenerate into what are now called dystrophic neurites.
* are a basic raw material used in agriculture, construction and processing industries
  - unit of soil structure
  - chemically inert, solid bodies held together by the cement
* are clusters of many soil particles in a single mass
  - particles of a variety of shapes and sizes
  - heavier than individual particles and so are harder for wind to move
  - intermediate between atoms and bulk samples
  - materials
  - objects of a class that exist over one or more threads and contexts
  - sums
* are the clumps of soil separates
  - essential constituents in civil engineering structures
  - only mineral commodity produced in every state in the union
  - typically the ingredient that physically constitute the bulk of a plaster
  - weapons
* can be as small as a grain of sand or as large as a pea
  - fine, such as sand, or coarse, such as gravel
  - scaly, compact, platy and as crusts
* consist in many cases of microorganisms attached to an organic matrix
  - of crushed stone, sand and gravel
* form crusts and granular masses
  - double-row chains in the form of a tight spiral coil
* is an unit
  - another term for sand, gravel, crushed stone, slag and expanded shale
  - any hard, mineral material such as gravel, crushed stone, sand, slag, etc
  - used as a base for roads and construction
* is used in everything from concrete to asphalt
  - the production of both asphalt concrete and ready-mix concrete
* means gravel, crushed stone, slag or marble chips.
* mixture of clean sand and gravel.

### aggregation | bunch:

Knot
* Every knot closed circular braid
  - has a fundamental quandle
* Many knots are relatives to each other.
* Some knots are used to bind or constrict objects
  - work well to hold people as they climb
* are a speed measurement that is nautical miles per hour
  - velvety olive-green color in the spring
* are actually abstract mathematical objects that have many different scientific applications
  - stuck muscle fibers that reduce flexibility within the muscle
  - another source of localized grain deviation that can cause crook or bow
  - bunchs
  - difficult to work with because they are topological objects
  - elementary to fishing whether it's fly fishing, spinning, or bait
  - fasteners
  - fertility symbols
  - films
  - part of boards
  - sandpipers
* are the bases of branches covered over by subsequent lateral growth of the tree trunk
  - lost branches which have been covered in time by new annual rings
  - major characteristic encountered in New Zealand pine which affect quality and grade
* are used for fasteners
  - ties
  - wood
* can cause short circuits and shocks
  - save spelunkers from being buried under rock
* eventually girdle affected branches, and tissue distal to the knot dies.
* form as the trunk grows outward, enveloping the base of the branches.
* has different colors of knots being randomly created.
* have a tendency to bleed resin through paint finishes
  - important role in navigating a ship
* originate at the center of the tree.
* used for bass fishing Just as in casting, there are several knots used in bass fishing.
* weaken the rope in which they are made.
+ Caving, Spelunkers and their equipment: Hobbies :: Caves
  * Spelunkers tie their ropes with different kinds of knots, like the 'farmer's hitch knot' and the 'alpine butterfly knot'. Spelunkers choose different knots for different purposes. Some knots work well to hold people as they climb. Other knots are best for tying ropes together.