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acantha

Definition:

any sharply pointed projection

Class:

shape noun (2- and 3-dimensional shapes)

Related to:

acanthous

Plural:

acanthae

Original source:

Princeton WordNet

Synonyms:

spine | spur

Etymology:

Greek ἄκανθα (akantha, "thorn"), from ἄκρα (akra, "point"). See acute.
(Source: Wiktionary)  [more]

Definition references

Collins Dictionary:

acantha [botany, zoology, anatomy]

a pointed, projecting structure, such as a thorn or prickle (10 of 243 words, pronunciation)

www​.collinsdictionary​.com​/dictionary​/english​/acantha

Wikipedia:

Acantha

a minor character in Greek mythology. She was a nymph loved by Apollo, the sun god. In one version of the story, Acantha refused Apollo's advances and scratched his face when he tried to rape her. Apollo then turned her into an acanthus plant. Another ... (45 of 168 words)

en​.wikipedia​.org​/wiki​/Acantha

Wiktionary:

acantha | acanthas [plural]

[botany] A prickle. | [zoology] A spine or prickly fin. | [anatomy] The vertebral column; the spinous process of a vertebra. (19 of 115 words, 3 definitions, 2 usage examples, pronunciation)

en​.wiktionary​.org​/wiki​/acantha

American Heritage Dictionary:

acantha | acanthae [plural]

A sharp spiny part or structure, such as the spinous process of a vertebra. (14 of 27 words, pronunciations)

www​.yourdictionary​.com​/acantha

Columbia Encyclopedia:

spinal column | vertebral column | spinal columns | backbone | coccyx | sacrum

bony column forming the main structural support of the skeleton of humans and other vertebrates, also known as the vertebral column or backbone. It ... (24 of 260 words)

www​.infoplease​.com​/ce​6​/sci​/A​0846282​.html

Oxford Dictionary:

spine | pay spine | spined [derived]

a series of vertebrae extending from the skull to the small of the back, ... | the central feature or main source of strength of something | ... (25 of 239 words, 7 definitions, 5 usage examples, pronunciation)

oxforddictionaries​.com​/definition​/english​/spine

Merriam-Webster:

spine | spicule [synonym, sense-specific] | backbone [synonym, sense-specific] | chine [synonym, sense-specific] | spinal column [synonym, sense-specific] | vertebral column [synonym, sense-specific] | back [similar, sense-specific] | spinal cord [similar, sense-specific] | vertebra [similar, sense-specific]

"spinal column" ; something resembling a spinal column or constituting a ... | a stiff pointed plant process ; especially, one that is a modified leaf ... (25 of 177 words, 3 definitions, pronunciations)

www​.merriam-webster​.com​/dictionary​/spine

New World Dictionary:

spine

any of the stiff, sharp-pointed, superficial emergences on a plant, as on a rose, thistle, or cactus | a sharp process of bone ; any of the sharp, ... (27 of 108 words, 5 definitions, pronunciation)

www​.yourdictionary​.com​/spine

Random House Dictionary:

spine

the spinal or vertebral column; backbone. | any backbonelike part. | a stiff, pointed process or appendage on an animal, as a quill of a porcupine, or ... (25 of 100 words, 7 definitions, 1 usage example, pronunciation)

dictionary​.infoplease​.com​/spine

Macmillan British Dictionary:

spine | spines [plural]

[countable, medical] the row of bones down or along the middle of a human's or animal's back | [countable] the edge of a book where all the pages are ... (28 of 95 words, 4 definitions, 1 usage example, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/spine

Cambridge Dictionary:

spine [entry 1] | spinal column

the line of bones down the centre of the back that provides support for the body and protects the spinal cord (21 of 49 words, 2 usage examples, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/spine 1

spine [entry 2]

a long sharp point like a needle growing out of an animal such as a hedgehog or a plant such as a cactus (23 of 31 words, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/spine 2

spine [entry 3]

the narrow strip where the cover of a book is joined to the pages, usually with the title and writer's name printed on it (24 of 33 words, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/spine 3

Britannica Encyclopedia:

projection [geometry]

in geometry, a correspondence between the points of a figure and a surface. In plane projections, a series of points on one plane may be projected ... (26 of 257 words, 1 image)

www​.britannica​.com​/E​Bchecked​/topic​/478464​/projection

projection [cartography]

in cartography, systematic representation on a flat surface of features of a curved surface, as that of the Earth. Such a representation presents an ... (24 of 185 words)

www​.britannica​.com​/E​Bchecked​/topic​/478461​/projection

Encarta Dictionary:

spine | spines [plural]

Same as spinal column | the back of a book cover to which the pages are attached | a sharp stiff projection on the body of an animal, e.g. the quill ... (29 of 106 words, 5 definitions, pronunciation)

encarta​.msn​.com​/dictionary 1861711799​/definition​.html  [offline]

Etymology references

Wiktionary:

acantha | acanthas [plural]

Origin: Greek ἄκανθα (akantha, "thorn"), from ἄκρα (akra, "point"). See acute.

en​.wiktionary​.org​/wiki​/acantha

American Heritage Dictionary:

acantha | acanthae [plural]

Origin: New Latin, from Greek akantha, thorn.

www​.yourdictionary​.com​/acantha

Audio references

the Free Dictionary:

acantha

Audio 1: North American English pronunciation of "acantha"

Audio 2: North American English pronunciation of "acantha" by speech synthesizer

www​.thefreedictionary​.com​/acantha

YourDictionary Audio:

acantha

Audio: North American English pronunciation of "acantha" by speech synthesizer

www​.yourdictionary​.com​/acantha

Page last updated: 2013-06-26

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