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ammonoid

Definition:

one of the coiled chambered fossil shells of extinct mollusks

Class:

object noun (natural, not man-made, objects)

Plural:

ammonoids

Original source:

Princeton WordNet

Synonyms:

ammonite

Etymology:

modern Latin Ammonoidea, based on "Ammon" (see "ammonite")
(Source: Oxford Dictionary)  [more]

Definition references  (+images)

Wikipedia:

Ammonoidea | Ammonites

an extinct group of marine invertebrate animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids than they are to shelled nautiloids such as the living Nautilus species. The earliest... (38 of 4057 words, pronunciation, 16 images)

en​.wikipedia​.org​/wiki​/Ammonoidea

Britannica Encyclopedia:

ammonoid [fossil cephalopod subclass] | ammonite

any of a group of extinct cephalopods, forms related to the modern pearly nautilus, that are frequently found as fossils in marine rocks dating from ... (25 of 302 words, 4 images)

www​.britannica​.com​/E​Bchecked​/topic​/21076​/ammonoid

Merriam-Webster:

ammonite | ammonoid [ammonite] | ammonitic [adjective, related]

any of a subclass (Ammonoidea) of extinct cephalopods especially abundant in the Mesozoic age that had flat spiral shells with the interior divided by ... (24 of 59 words, pronunciations, 1 image)

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

Collins Dictionary:

ammonoid [palaeontology]

any of the extinct group of sea-dwelling cephalopod molluscs with coiled and chambered shells (14 of 263 words, pronunciation)

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

American Heritage Dictionary:

ammonite | Ammonite | ammonoid [sense-specific] | ammonitic [adjective, related]

The coiled, flat, chambered fossil shell of an extinct cephalopod mollusk that was abundant in the Cretaceous Period. | A member of a Semitic people ... (24 of 92 words, 3 definitions, pronunciations)

www​.yourdictionary​.com​/ammonite

Oxford Dictionary:

ammonoid

[Palaeontology] : an extinct cephalopod mollusc with a flat-coiled spiral ... | See "ammonite", "ceratite", and "goniatite" | relating to the ... (19 of 71 words, 3 definitions, pronunciation)

oxforddictionaries​.com​/definition​/english​/ammonoid

Random House Dictionary:

ammonoid

any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell. (20 of 25 words, pronunciation)

dictionary​.infoplease​.com​/ammonoid

Wiktionary:

ammonoid | ammonoids [plural] | ammonite [synonym, sense-specific]

ammonite | Characteristic of an ammonite (5 of 7 words, 2 definitions)

en​.wiktionary​.org​/wiki​/ammonoid

Columbia Encyclopedia:

ammonite

one of a type of extinct marine cephalopod mollusk, related to the nautilus and resembling it in having an elaborately coiled and chambered shell. ... (24 of 73 words, pronunciation)

www​.infoplease​.com​/ce​6​/sci​/A​0803767​.html

New World Dictionary:

ammonite | ammonitic [adjective, related]

any of the flat, usually coiled fossil shells of an extinct order (Ammonoidea) of cephalopod mollusks dominant in the Mesozoic era (21 of 47 words, pronunciations)

www​.yourdictionary​.com​/ammonite

Macmillan British Dictionary:

ammonite [countable] | ammonites [plural]

a fossil of an ancient type of mollusc (=sea animal with a soft body and a hard shell) (18 of 43 words, pronunciation)

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

Cambridge Dictionary:

ammonite [specialized]

an extinct (no longer existing) sea creature often found as a fossil (animal or plant turned into rock), with a flat, spiral shell (23 of 31 words, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/ammonite

Encarta Dictionary:

ammonoid | ammonoids [plural]

an extinct cephalopod mollusk with a partitioned shell (8 of 30 words, pronunciation)

encarta​.msn​.com​/dictionary 1861585207​/definition​.html  [offline]

Etymology references

Oxford Dictionary:

ammonoid

First use: mid 19th century

Origin: modern Latin Ammonoidea, based on "Ammon" (see "ammonite")

oxforddictionaries​.com​/definition​/english​/ammonoid

ammonite

First use: mid 18th century

Origin: modern Latin ammonites, from medieval Latin cornu Ammonis "horn of Ammon", from the fossil's resemblance to the ram's horn associated ... (23 of 28 etymology words)

oxforddictionaries​.com​/definition​/english​/ammonite

Online Etymology:

ammonite

First use: 1758

Origin: "cephalopod mollusk", from French (Breyn, 1732), "better established" [Century Dictionary] by French zoologist Jean Guillaume Bruguière (about ... (18 of 54 etymology words)

www​.etymonline​.com​/index​.php term=ammonite

American Heritage Dictionary:

ammonite

Origin: New Latin Ammōnītēs, from Latin (cornū) Ammōnis, (horn) of ... | From Late Latin Ammōnītēs, the Ammonites, from Hebrew ... (18 of 39 etymology words)

www​.yourdictionary​.com​/ammonite

Collins Dictionary:

ammonite

First use: 18th century | 20th century

Origin: from New Latin Ammōnītēs, from Medieval Latin cornū Ammōnis, literally: horn of Ammon | from ammo(nium) + ni(tra)te

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

New World Dictionary:

ammonite

Origin: Modern Latin ammonites from Latin (cornu) Ammonis, (horn) of Ammon from Jupiter "Ammon", whose statues were represented with ram's horns

www​.yourdictionary​.com​/ammonite

Merriam-Webster:

Ammonite

First use: 1530

Origin: Late Latin Ammonites, from Hebrew 'Ammōn Ammon (son of Lot), descendant of Ammon

www​.merriam-webster​.com​/dictionary​/ammonite show=1

ammonite

First use: 1758

Origin: New Latin ammonites, from Latin cornu Ammonis, literally, horn of Ammon

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

Wiktionary:

ammonite

Origin: French ammonite, from Latin ammonis (cornua) "(horns of) Ammon".

en​.wiktionary​.org​/wiki​/ammonite

Encarta Dictionary:

ammonoid | ammonoids [plural]

First use: Mid-19th century

Origin: modern Latin Ammonoidea from ammonites

encarta​.msn​.com​/dictionary 1861585207​/definition​.html  [offline]

Ammonite [bc.] | Ammonites [plural]

First use: Mid-16th century

Origin: late Latin from Hebrew 'Ammōn "Ammon (son of Lot)"

encarta​.msn​.com​/dictionary 1861585199​/definition​.html  [offline]

ammonite [entry 1] | ammonites [plural]

First use: Mid-18th century

Origin: modern Latin ammonites from medieval Latin cornu Ammonis "horn of Ammon"

encarta​.msn​.com​/dictionary 1861585197​/definition​.html  [offline]

ammonite [entry 2]

First use: Mid-20th century

Origin: ammonium + nitrate

encarta​.msn​.com​/dictionary 1861585198​/definition​.html  [offline]

Audio references

the Free Dictionary:

ammonoid

Audio 1: North American English pronunciation of "ammonoid"

Audio 2: British English pronunciation of "ammonoid"

Audio 3: North American English pronunciation of "ammonoid" by speech synthesizer

www​.thefreedictionary​.com​/ammonoid

Ammonite

Audio 1: North American English pronunciation of "Ammonite"

Audio 2: British English pronunciation of "Ammonite"

Audio 3: North American English pronunciation of "Ammonite" by speech synthesizer

www​.thefreedictionary​.com​/Ammonite

Merriam-Webster Pronunciation:

ammonoid

Audio: North American pronunciation of "ammonoid"

www​.merriam-webster​.com​/audio​.php file=ammono​01 word=ammonoid

ammonite

Audio: North American pronunciation of "ammonite"

www​.merriam-webster​.com​/audio​.php file=ammoni​09 word=ammonite

Ammonite

Audio: North American pronunciation of "Ammonite"

www​.merriam-webster​.com​/audio​.php file=ammoni​12 word=Ammonite

YourDictionary Audio:

ammonoid

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

www​.yourdictionary​.com​/ammonoid

ammonite

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

www​.yourdictionary​.com​/ammonite

Collins Dictionary:

ammonite

Audio 1: British English pronunciation of "ammonite"

Audio 2: British English pronunciation of "ammonite"

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

Macmillan British Dictionary:

ammonite [countable] | ammonites [plural]

Audio: British English pronunciation of "ammonite"

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

Macmillan American Dictionary:

ammonite [countable] | ammonites [plural]

Audio: North American pronunciation of "ammonite"

www​.macmillandictionary​.com​/dictionary​/american​/ammonite

Cambridge Dictionary:

ammonite [specialized]

Audio 1: British English pronunuciation of "ammonite"

Audio 2: North American English pronunuciation of "ammonite"

dictionary​.cambridge​.org​/dictionary​/british​/ammonite

Google Dictionary:

ammonite | ammonites [plural]

Audio: English pronunciation of "ammonite"

www​.google​.com​/#hl=en&tbs=dfn​:1&fp=1&q=ammonite

Page last updated: 2013-06-26

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