The shortened form of a word is known as an abbreviation
acronym
Telomeres
allitaration
Acronym
they are called Mnemonics :)
An acrostic is a type of sentence where the first letter of each subsequent word follows chronologically to spell out a word or message.
Microtubules pull the chromatids from the chromosome apart. Each former sister c
An acrostic poem is a type of poem where the first letter of each line spells out a word or message. Each letter representing a different meaning is known as the mnemonic acrostic, where each letter stands for a distinct concept related to the main word or message of the poem.
No. Acronyms are for multiple words, normally combining the first letter of each word. ie NATO - North Atlantic Treaty Organisation. You can abbreviate it/shorten it to anything you want but there isn't anything standard I know of.
First letter, perhaps
Yes. The length of a shadow is determined by the altitude of the Sun. Therefore shadows shorten then lengthen as each day progresses and, between days, shorten and lengthen as summer comes and passes.
You described an acrostic poem.
It's called an acronym (such as FBI, NASA or USA) when the first letter or letters of some words are used.These may also be called "initialisms" including D.A. (district attorney) or BBC.