# fertilization

/ˌfɝtəɫɪˈzeɪʃən/ (US)

Source: https://englishreference.com/word/fertilization
Updated: 2026-08-27

## Senses

### 1. joining of sperm and egg

noun · CEFR B2 · Technical

the moment when a male sperm and a female egg join together to start the development of a new life.

For teachers: the fusion of male and female gametes to form a zygote. This process is fundamental to sexual reproduction in both animals and plants.

- In many fish species, fertilization happens in the water rather than inside the body.
- The success of in vitro fertilization depends heavily on the quality of the harvested gametes and the timing of the procedure.

Usage: Often used in the context of 'internal' or 'external' fertilization.

Teaching tip: Note the spelling difference: 'fertilization' is American English, while 'fertilisation' is British English.

### 2. adding nutrients to soil

noun · CEFR B2

the act of putting natural or chemical substances into the soil to help plants grow better.

For teachers: the application of organic or inorganic substances to soil or plant tissues to supply nutrients essential to plant growth.

- Regular fertilization of the lawn ensures the grass stays green and healthy all summer.
- Excessive fertilization of agricultural runoff can lead to significant environmental damage in nearby water systems.

Usage: Uncountable when referring to the general practice; countable when referring to a specific instance of applying fertilizer.

### 3. cross-fertilization of ideas

noun · CEFR C1 · Academic

the mixing of different ideas or cultures that results in something new and productive.

For teachers: the metaphorical exchange or mixing of ideas, cultures, or influences that promotes growth or innovation.

- The meeting allowed for a fertilization of ideas between the marketing and design teams.
- The city's vibrant art scene is the result of a constant cross-fertilization between local traditions and international influences.

Usage: Commonly appears in the compound 'cross-fertilization'.

Teaching tip: This is a figurative use of the biological term. It implies that the mixture is 'fertile' or productive.

## Examples

- The farmer finished the fertilization of the fields yesterday.
- Successful fertilization of the egg must occur within a specific window of time for the embryo to develop properly.
- Modern agricultural practices rely heavily on chemical fertilization to maintain high crop yields, though organic alternatives are increasingly favoured for long-term soil health and environmental sustainability.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.