nautilus
part of speech
noun (a nautilus, nautiluses or nautili)
meaning for a pupil
1) A sea animal related to the octopus and squid, which lives inside a coiled, striped shell divided into chambers. tree →
2) Nautilus: the name of famous submarines, including Captain Nemo's in Jules Verne's novel and the first nuclear submarine (a name). tree →
sense in the lessons
In science lessons the nautilus is an example of a mollusc and a «living fossil», as its relatives lived over 400 million years ago. Its shell is a spiral, used in maths to show spirals in nature. It floats by changing the gas in its shell chambers, like a submarine.
examples
- A nautilus has up to ninety small tentacles. tree →
- The nautilus shell is a beautiful spiral. tree →
- The nautilus moves up and down by filling its chambers with gas or water. tree →
- In «Twenty Thousand Leagues Under the Sea», the submarine is called the Nautilus. tree →
- We saw a nautilus at the aquarium. tree →
- Ammonites were ancient animals like the nautilus. tree →
- She had watched jelly-fish and nautilus swimming a little way below the surface, and beautiful coloured sea-weeds floating about; but that was all. tree →
note
Plural: nautiluses or nautili. Pronounced «NAW-ti-lus». A myth: the nautilus shell is often said to follow the «golden ratio» exactly, but real measurements show it does not.
Trees and pragmatics
Every meaning and example of «nautilus» parsed by Mova, each sentence with its dependency tree and frames.