
1) Genus pholas 2) Mollusk genus
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https://www.crosswordclues.com/clue/pholas

Pholas is a taxonomic genus of marine bivalve molluscs in the family Pholadidae. Like other members of this family, they have an ability to bore through clay, earth, wood and soft rock. ==Subgenera== ...
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http://en.wikipedia.org/wiki/Pholas

• (n.) Any one of numerous species of marine bivalve mollusks of the genus Pholas, or family Pholadidae. They bore holes for themselves in clay, peat, and soft rocks.
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http://thinkexist.com/dictionary/meaning/pholas/

<marine biology> Any one of numerous species of marine bivalve mollusks of the genus Pholas, or family Pholadidae. They bore holes for themselves in clay, peat, and soft rocks. ... Origin: NL, fr. Gr, a kind of mollusk. ... (19 Mar 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
Pho'las noun ;
plural Pholades . [ New Latin , from Greek ..., ..., a kind of mollusk.]
(Zoology) Any one of numerous species of marine bivalve mollusks of the genus
Pholas , or family
Pholadidæ . They bore holes for themselves in clay, peat, and soft rocks.
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http://www.encyclo.co.uk/webster/P/74

Pholas is a genus of burrowing bivalve molluscs, also known as piddocks in parts of England where they are used as bait. The species are found within such rocks as shale, chalk, limestone and the like. Like all burrowing bivalves, they have gaping shells, which in this genus are pure white in colour, and have accessory plates of lime attached. The ...
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http://www.probertencyclopaedia.com/browse/BP.HTM

[
n] - type genus of the family Pholadidae: piddocks
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http://www.webdictionary.co.uk/definition.php?query=Pholas

A marine insect very destructive to timber.
Found on
http://www.woodworkersuk.co.uk/blog/carpentry-and-joinery-glossary/carpentr
genus Pholas noun type genus of the family Pholadidae: piddocks
Found on
https://www.encyclo.co.uk/local/20974
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