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

the first beginnings of an organ or part in the developing embryo. Called also anlage.
References in periodicals archive ?
The application of urea at the beginning of tillering with foliar fertilization in floral primordium (T5) also resulted in highest productivity.
The genital primordium is large and usually visible in Strongyloides rhabditiform larvae but not readily apparent in hookworm rhabditiform larvae.
A growing stem continually produces auxin, and a new primordium forms only when the concentration of auxin reaches a critical value.
The primordium forms when the fish is still in the larval stage, and its chemical composition contains a record of where the fish was born.
The small-celled transition zone above the leaf primordium produces the leaf gap (Fig.
The interior of the spine primordium consisted mostly of mesenchymal-like cells.
A zonal pattern characteristic of mature vegetative shoot apices becomes evident in the axillary bud during the initiation of the first leaf primordium.
5 leaves) regardless of the treatments, whereas under the 16-h daylength, the initiation of floral primordium occurred at 10.
5] Perrone et al[1] postulated that the tumor is derived from Van Campenhout endodermal-neuroectodermal complexes in the ventral primordium of the pancreas.
The results showed that growth of the thyroid (as indicated by its volume) is not accompanied by expansion of the primordium into the surrounding pharyngeal space (as indicated by its area).
larval tail resorption, papillae retraction, and initiation of the programmed degradation of muscle myofibrils appeared normal), metamorphosis was abnormal in that postlarvae did not develop ampullae or undergo the rotation of the endodermal primordium (see Degnan et al.