
1) Anlage 2) Organ
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https://www.crosswordclues.com/clue/primordium

1) Anlage
Found on
https://www.crosswordclues.com/clue/primordium

Latin, meaning: first beginning, origin
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http://archives.nd.edu/ppp.htm

A primordium (m; plural: primordia) in embryology, is defined as an organ or tissue in its earliest recognizable stage of development. Cells of the primordium are called primordial cells. A primordium is the simplest set of cells capable of triggering growth of the would-to-be organ and the initial foundation from which an organ is able to grow. A...
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http://en.wikipedia.org/wiki/Primordium

a organ or tissue in it's earliest state of development
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http://orchidfetish.com/glossary.html

A tissue or plant organ in its earliest distinct state.
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http://www.encyclo.co.uk/local/20637

An aggregation of cells in the embryo indicating the first trace of an organ or structure. ... Synonym: anlage. ... Origin: L. Origin, fr. Primus, first, + ordior, to begin ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973

(pri-mor´de-әm) the first beginnings of an organ or part in the developing embryo.
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http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: prī-mōr′dē-ŭm Definitions: 1. An aggregation of cells in the embryo indicating the first trace of an organ or structure. Synonyms: anlage1
Found on
http://www.medilexicon.com/medicaldictionary.php?t=72071

Primordium: In embryology, organ or tissue in its earliest recognizable stage of development. As, for example, the thyroid primordium. The plural is primordia. Borrowed directly from the Latin primordium (to begin), derived from the Latin words primus (first) + ordiri (to begin0. Known also as the anlage or rudiment.
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http://www.medterms.com/script/main/art.asp?articlekey=33809

a organ or tissue in it's earliest state of development
Found on
http://www.orchidspecies.com/glossary.htm

[
n] - an organ in its earliest stage of development
Found on
http://www.webdictionary.co.uk/definition.php?query=primordium
anlage noun an organ in its earliest stage of development; the foundation for subsequent development
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https://www.encyclo.co.uk/local/20974

the first recognizable, histologically differentiated stage in the development of an organ.
Found on
https://www.infoplease.com/dictionary/primordium
No exact match found.