rudimentary structures

noun
UK /ˌruːdɪˈmentəri ˈstrʌktʃəz/
US /ˌruːdəˈmentəri ˈstrʌktʃərz/

Simple, basic shapes or parts that are just beginning to form.

The tiny plant showed only rudimentary structures where its leaves would later grow.


OTHER MEANINGS

2. Very simple body parts that are not fully developed.

The embryo's rudimentary structures will become arms and legs.

3. Basic building blocks or early versions of something more complex.

The model uses rudimentary structures to show how the machine works.

4. Simple organizational parts that are just starting to appear.

The new club had only rudimentary structures, like a name and a meeting time.