pondweed

«pondweed» in Mova's school dictionary: A plant that grows in ponds and slow rivers, often under… — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

part of speech

noun (pondweed — uncountable; a pondweed, pondweeds)

meaning for a pupil

A plant that grows in ponds and slow rivers, often under or on the water, with green leaves or stems. tree →

sense in the lessons

In science lessons, pondweed (often Canadian pondweed, Elodea) is used in experiments on photosynthesis: put it in water under a lamp and count the oxygen bubbles. Pondweed gives food, shelter and oxygen to pond animals like tadpoles and snails. In stories, pondweed is slimy and tangly. Phrases: «count the bubbles», «pondweed experiment», «covered in pondweed».

examples

• We counted the oxygen bubbles coming from the pondweed. tree →
• When the lamp was closer, the pondweed made more bubbles. tree →
• Tadpoles hide in the pondweed. tree →
• The frog jumped out covered in green pondweed. tree →
• Too much pondweed can choke a pond. tree →
• Our class pond has lots of pondweed. tree →

note

Usually uncountable («some pondweed»); «pondweeds» for kinds. One word. In the experiment, more light means more bubbles (more photosynthesis) up to a point — a fair test changes only the distance of the lamp.

In the corpora

• Water plants use light to make sugar and give off oxygen, so pondweed makes bubbles in sunlight and stops in the dark.

Trees and pragmatics

Every meaning and example of «pondweed» parsed by Mova, each sentence with its dependency tree and frames.