primordium


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primordium

 [pri-mor´de-um]
the first beginnings of an organ or part in the developing embryo.

pri·mor·di·um

(prī-mōr'dē-ŭm),
An aggregation of cells in the embryo indicating the first trace of an organ or structure.
Synonym(s): anlage (1)
[L. origin, fr. primus, first, + ordior, to begin]

primordium

/pri·mor·di·um/ (-um) pl. primor´dia   [L.] the earliest indication of an organ or part during embryonic development.

primordium

(prī-môr′dē-əm)
n. pl. primor·dia (-dē-ə)
An organ or a part in its most rudimentary form or stage of development.

primordium

[prīmôr′dē·əm] pl. primordia
Etymology: L, origin
the first recognizable stage in the embryonic development and differentiation of a particular organ, tissue, or structure. Also called anlage, rudiment.

pri·mor·di·um

, pl. primordia (prī-mōr'dē-ŭm, -ă)
An aggregation of cells in the embryo indicating the first trace of an organ or structure.
Synonym(s): anlage (1) .
[L. origin, fr. primus, first, + ordior, to begin]

pri·mor·di·um

, pl. primordia (prī-mōr'dē-ŭm, -ă)
An aggregation of cells in the embryo indicating the first trace of an organ or structure.
Synonym(s): anlage.
[L. origin, fr. primus, first, + ordior, to begin]

primordium (primor´deəm),

n the first evidence of an organ in a developing embryo.

primordium

the first beginnings of an organ or part in the developing embryo. Called also anlage.
References in periodicals archive ?
As auxin production across the stem tip continues, that farthest spot will be the first to reach the critical threshold to form a new primordium.
The pharyngeal roof and any neural tissue attached to the pharyngeal arches that might obscure the view of the primordium were also removed.
In the young buds, stamen peimordia developed earlier than ovary primordium.
6) This incomplete image may be attributable to unilateral agenesis of the secretory acini of the terminal duct that was formed from the submandibular gland primordium during early fetal development.
Primordium formation in axenic cultures of Agaricus bisporus (Lange) Sing.
So what is it in a mutant that tells the eye primordium not to develop?
4c-g) and all are similar in size, although the lower petal primordium is more strongly curved than the upper petal primordia early in development (Fig.
Sardine sagittal otoliths are asymmetric and lend themselves to measurements between multiple landmark points on the perimeter and through the primordium.
The venation patterns of higher dicots form in 3-5 different stages during leaf growth and morphogenesis: 1) The bundle of preexisting midvein vasculature grows from the lower stem towards leaf primordium in an acropetal fashion (from lower to higher regions of the stem); 2) The bundle of pre-existing secondary vasculature continues to the edge during leaf blade formation; 3) Networks of quaternary and higher order veins, including veins at the free ends, form during leaf growth.
1) They are derived from different embryologic cell anlages: the epibranchial placode of the second branchial arch and the neural crest of the facial primordium, respectively.
Twice a week, the bottles are checked and caps pulled by hand when the white primordium 2-5 mm (0.
Lardizabalaceae; Sugiyama & Hara, 1988; Ranunculaceae; Pabon-Mora, 2012) clearly show that each compound leaf initiates from a single primordium, and that an early incepted terminal leaflet is always present, which clearly contradicts Ahrend's (1961) statement that a short shoot of Berberis is equivalent to a compound leaf.