log

1. A segment of the trunk of a tree when stripped of branches (synset 114966900)
   is a type of: wood - the hard fibrous lignified substance under the bark of trees
   subtypes:

   • nurse log - a large decomposing tree trunk that has fallen, usually in a forest; the decaying wood provides moisture and nutrients for a variety of insects and plants
   • saw log - log large enough to be sawed into boards
2. The exponent required to produce a given number (synset 106825489)
   is a type of: exponent, index, power - a mathematical notation indicating the number of times a quantity is multiplied by itself
   subtypes:

   • common logarithm - a logarithm to the base 10
   • napierian logarithm, natural logarithm - a logarithm to the base e
   same as: logarithm
3. A written record of messages sent or received (synset 106516146)
   "they kept a log of all transmission by the radio station"; "an email log"
   is a type of: written account, written record - a written document preserving knowledge of facts or events
4. A written record of events on a voyage (of a ship or plane) (synset 106515875)
   referred to in:

   • aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets
   • ship - a vessel that carries passengers or freight
   is a type of: written account, written record - a written document preserving knowledge of facts or events
5. Measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the water (synset 103691984)
   is a type of: measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
   subtypes:

   • harpoon log - a cylindrical log with a device that registers distance
   • patent log, screw log, taffrail log - a cigar-shaped log with rotary fins that measure the ship's speed
   has: log line - a knotted cord that runs out from a reel to a piece of wood that is attached to it
   is a part of: ship - a vessel that carries passengers or freight

1. Enter into a log, as on ships and planes (synset 201004526)
   is a type of: enter, put down, record - make a record of; set down in permanent form
2. Cut lumber, as in woods and forests (synset 201261392)
   is a type of: cut down, drop, fell, strike down - cause to fall by or as if by delivering a blow
   same as: lumber

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