delta

«delta» in Mova's school dictionary: A flat, often triangle-shaped area of land where a river… — its meaning for a pupil, its sense in the lessons and examples, with 4 sentences of Mova's corpora that use it.

part of speech

noun (a delta, deltas)

meaning for a pupil

1) A flat, often triangle-shaped area of land where a river splits into many smaller streams before it flows into the sea, made from mud and sand the river carries. tree →

2) The fourth letter of the Greek alphabet, Δ or δ. tree →

3) In maths and science, Δ can stand for a change in an amount. tree →

sense in the lessons

In geography, deltas form at the mouths of rivers like the Nile and the Mississippi; the soil is rich for farming but floods easily. In maths and science, Δ means «change in». Phrases: «river delta», «the Nile Delta».

examples

• The Nile Delta is shaped like a triangle. tree →
• The river drops its mud and sand to build a delta. tree →
• Many birds live in the wetlands of the delta. tree →
• Farmers grow rice on the delta because the soil is rich. tree →
• The Greek letter delta looks like a triangle: Δ. tree →
• Floods are common on a low, flat delta. tree →

note

Countable: deltas. Named after the Greek letter Δ because many deltas are triangle-shaped. Not every river has a delta; strong waves or tides can wash the mud away.

In the corpora

• Mud carried by the great river piles up at its mouth, so this delta builds new land into the sea year after year.
• The delta is home to hundreds of kinds of birds, fish and frogs.
• A delta forms where a river drops its sediment at the mouth faster than the sea can carry it away.
• A delta is flat land built from the mud and sand a river drops where it slows down at its mouth.

Trees and pragmatics

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