Definition of primordium in English:

primordium

nounPlural primordia prʌɪˈmɔːdɪəmprīˈmôrdēəm

Biology

An organ, structure, or tissue in the earliest stage of development.
〔生〕（器官、结构或组织的）原基
the primordium of the pituitary
the axils of the leaf primordia
Example sentencesExamples
- Although mitoses were still detected in leaf primordia of that stage, cell differentiation had already started.
- Microscopical examination for the fungal infection was performed on the bristles, adjacent hypocotyl surface and the internal tissue of root primordia.
- In flowers, both genes are expressed throughout inflorescence and floral meristems and in developing organ primordia.
- These organ primordia, which develop after a period of time corresponding to winter in temperate regions, are called preformed organs.
- The development is initiated as a hyphal knot of 0.2 mm or less in diameter, which rapidly develops into a tiny primordium containing the rudimentary tissues of the future pileus and stipe.

Origin

Late 19th century: from Latin, neuter of primordius 'original', from primus 'first' + ordiri 'begin'.

Definition of primordium in US English:

primordium

nounprīˈmôrdēəm

Biology

An organ, structure, or tissue in the earliest stage of development.
〔生〕（器官、结构或组织的）原基
the primordium of the pituitary
the axils of the leaf primordia
Example sentencesExamples
- The development is initiated as a hyphal knot of 0.2 mm or less in diameter, which rapidly develops into a tiny primordium containing the rudimentary tissues of the future pileus and stipe.
- These organ primordia, which develop after a period of time corresponding to winter in temperate regions, are called preformed organs.
- In flowers, both genes are expressed throughout inflorescence and floral meristems and in developing organ primordia.
- Microscopical examination for the fungal infection was performed on the bristles, adjacent hypocotyl surface and the internal tissue of root primordia.
- Although mitoses were still detected in leaf primordia of that stage, cell differentiation had already started.

Origin

Late 19th century: from Latin, neuter of primordius ‘original’, from primus ‘first’ + ordiri ‘begin’.

词汇	primordium
释义	Definition of primordium in English: primordium nounPlural primordia prʌɪˈmɔːdɪəmprīˈmôrdēəm Biology An organ, structure, or tissue in the earliest stage of development. 〔生〕（器官、结构或组织的）原基 the primordium of the pituitary the axils of the leaf primordia Example sentencesExamples Although mitoses were still detected in leaf primordia of that stage, cell differentiation had already started. Microscopical examination for the fungal infection was performed on the bristles, adjacent hypocotyl surface and the internal tissue of root primordia. In flowers, both genes are expressed throughout inflorescence and floral meristems and in developing organ primordia. These organ primordia, which develop after a period of time corresponding to winter in temperate regions, are called preformed organs. The development is initiated as a hyphal knot of 0.2 mm or less in diameter, which rapidly develops into a tiny primordium containing the rudimentary tissues of the future pileus and stipe. Origin Late 19th century: from Latin, neuter of primordius 'original', from primus 'first' + ordiri 'begin'. Definition of primordium in US English: primordium nounprīˈmôrdēəm Biology An organ, structure, or tissue in the earliest stage of development. 〔生〕（器官、结构或组织的）原基 the primordium of the pituitary the axils of the leaf primordia Example sentencesExamples The development is initiated as a hyphal knot of 0.2 mm or less in diameter, which rapidly develops into a tiny primordium containing the rudimentary tissues of the future pileus and stipe. These organ primordia, which develop after a period of time corresponding to winter in temperate regions, are called preformed organs. In flowers, both genes are expressed throughout inflorescence and floral meristems and in developing organ primordia. Microscopical examination for the fungal infection was performed on the bristles, adjacent hypocotyl surface and the internal tissue of root primordia. Although mitoses were still detected in leaf primordia of that stage, cell differentiation had already started. Origin Late 19th century: from Latin, neuter of primordius ‘original’, from primus ‘first’ + ordiri ‘begin’.
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