Dictionary » E » Essential

Essential

Essential

1. Belonging to the essence, or that which makes an object, or class of objects, what it is. Majestic as the voice sometimes became, there was forever in it an essential character of plaintiveness. (Hawthorne)

2. Hence, really existing; existent. Is it true, that thou art but a a name, And no essential thing? (webster (1623))

3. Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. Judgment's more essential to a general Than courage. (Denham) How to live? that is the essential question for us. (H. Spencer)

4. Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil. Mine own essential horror.

5. Necessary; indispensable; said of those tones which constitute a chord, in distinction from ornamental or passing tones.

6. (Science: medicine) Idiopathic; independent of other diseases.

(Science: biology) essential character, a class of volatile oils, extracted from plants, fruits, or flowers, having each its characteristic odour, and hot burning taste. They are used in essences, perfumery, etc, and include many varieties of compounds; as lemon oil is a terpene, oil of bitter almonds an aldehyde, oil of wintergreen an ethereal salt, etc.; called also volatile oils in distinction f 42f rom the fixed or nonvolatile.

Origin: cf. F. Essentiel. See essence.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Bioinformatics Hands-On NGS Data Analysis Workshops 2014

... data (miRanalyzer) to join us for our microRNA workshop. This course titled microRNA Analysis Using High-Throughput Sequencing will cover the essential steps of small RNA-seq analysis from microRNA prediction to extensive downstream analyses. We also have a workshop on DNA Methylation Analysis ...

See entire post
by ecSeq
Mon Jul 07, 2014 2:54 pm
 
Forum: General Discussion
Topic: Bioinformatics Hands-On NGS Data Analysis Workshops 2014
Replies: 0
Views: 667

Humans Natural Habitat/Optimal Environment

... capitalist market if you like, in that stagnation is a disaster. You need things to stay dynamic in order for change to happen, and that change is essential. Whilst at this point in time you may prefer one environment to all others you will be able to adapt to others. The perfect environment in ...

See entire post
by Babybel56
Tue Mar 04, 2014 6:04 am
 
Forum: Evolution
Topic: Humans Natural Habitat/Optimal Environment
Replies: 2
Views: 3568

Biology tests

... the complete breakdown of immune function. For example if you had mentioned the T-helpers and macrophages you could have explained why these are essential for immune defence, and so why without them AIDS will happen.

See entire post
by Babybel56
Fri Feb 28, 2014 9:37 am
 
Forum: General Discussion
Topic: Biology tests
Replies: 1
Views: 1201

Does other animals have faster nerve speeds?

... big, insulated ones for processes that need to be very fast. For example the giant squid has an axon up to 1mm thick and is responsible for the essential system that allows it to pump water and move around. For escaping from trouble this quick response therefore merits a very, very quick response. ...

See entire post
by Babybel56
Fri Feb 28, 2014 8:55 am
 
Forum: General Discussion
Topic: Does other animals have faster nerve speeds?
Replies: 1
Views: 1292

Re: Are predators always smarter than their prey?

... avoid and respond to predation, animals must first identify the presence of a potential predator. The ability to recognize predator cues is essential for the initiation of antipredator behavior. This can be innate, for example, animals can identify predators as a threat even if they have ...

See entire post
by Gannet
Mon Feb 24, 2014 10:18 am
 
Forum: Zoology Discussion
Topic: Are predators always smarter than their prey?
Replies: 12
Views: 8209
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 6,598 times. 
What links here | Related changes | Permanent link