primordium
Embryonic tissue precursor
A primordium is the earliest recognizable stage of an organ or structure in an embryo—the cellular cluster from which a limb, leaf, or organ will develop.
In biology, primordia (the plural) represent the foundational material before differentiation occurs: The heart primordium appears in the third week of human development.
The term extends to any rudimentary beginning of something that will later elaborate into complex form.
Plant growth tissue
- budUnopened plant growth
- cambiumPlant growth tissue
- organogenesisEmbryonic tissue becoming structures
- inflorescencePlant's complete bloom arrangement
In simplest possible form
- inchoatePartially formed, undeveloped
- nascentBeginning to develop
- embryonicAt earliest developmental stage
- incipientStarting to develop
formative · undeveloped · primitive · germinal · initial · unformed · basic · preliminary
Initial stage of something
- inceptionFounding moment
- genesisPoint of creation
- nascenceState of being born
- emergenceComing into existence
dawn · source · root · germination · outset · birth · commencement · advent
Embryonic tissue becoming structures
- morphogenesisDevelopmental shape emergence
- ectodermEmbryo's outer cell layer
- endodermInnermost embryonic tissue layer
- mesodermEmbryonic tissue forming muscles
somite · gastrulation · induction · embryogenesis · blastocyst · rudiment · precursor
meristem
Plant growth tissue
- budUnopened plant growth
- cambiumPlant growth tissue
- organogenesisEmbryonic tissue becoming structures
rudimentary
In simplest possible form
- inchoatePartially formed, undeveloped
- nascentBeginning to develop
- embryonicAt earliest developmental stage
incipient · formative · undeveloped · primitive · germinal · initial · unformed · basic · preliminary · immature
beginning
Initial stage of something
emergence · dawn · source · root · germination · outset · birth · commencement · advent · threshold
organogenesis
Embryonic tissue becoming structures
- morphogenesisDevelopmental shape emergence
- ectodermEmbryo's outer cell layer
- endodermInnermost embryonic tissue layer
mesoderm · somite · gastrulation · induction · embryogenesis · blastocyst · rudiment · precursor
- primordial soupHypothetical life-origin mixture
- primordial chaosFormless state before creation
- primordial seaEarth's earliest waters
- primordial watersOriginal formless ocean