fertilization

noun

fer·​til·​i·​za·​tion ˌfər-tə-lə-ˈzā-shən 

: an act or process of making fertile: such as

a

: the application of fertilizer

b(1)

: an act or process of fecundation, insemination, or pollination

—not used technically

(2)

: the process of union of two gametes whereby the somatic chromosome number is restored and the development of a new individual is initiated

Examples of fertilization in a Sentence

Recent Examples on the Web

The initiative is part of a broader effort to expand access to in vitro fertilization (IVF) and reduce its cost, though key details about its implementation remain unclear. —Alexandra Banner, CNN Money, 17 Oct. 2025

To lessen the effects of these diseases, which can overwinter, avoid fertilization high in nitrogen, overwatering, and allowing heavy thatch to build up. —Mary Marlowe Leverette, Southern Living, 17 Oct. 2025

The Oval Office announcement offers a first glimpse at how Trump plans to follow up on his executive order earlier this year aiming to reduce the cost of in vitro fertilization, a medical procedure that helps people facing infertility build their families. —Ali Swenson, Fortune, 16 Oct. 2025

Only about one in four large employers currently provides in vitro fertilization coverage, according to a report from KFF, a nonprofit research organization, and very few states require insurance companies to cover fertility treatments. —Nik Popli, Time, 16 Oct. 2025

Word History

First Known Use

circa 1787, in the meaning defined above

Phrases Containing fertilization

• cross-fertilization
• double fertilization
• fertilization membrane
• in vitro fertilization
• self-fertilization

Rhymes for fertilization

• abbreviation
• abomination
• acceleration
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration

Kids Definition

fertilization

noun

fer·​til·​i·​za·​tion ˌfərt-ᵊl-ə-ˈzā-shən 

1

: an act or process of making fertile

especially : the application of fertilizer

2

: the union of male and female germ cells to form a zygote

Medical Definition

fertilization

noun

fer·​til·​iza·​tion

variants or British fertilisation

ˌfərt-ᵊl-ə-ˈzā-shən 

: an act or process of making fertile: as

a

: an act or process of fecundation, insemination, or impregnation

b

: the process of union of two gametes whereby the somatic chromosome number is restored and the development of a new individual is initiated

fertilize transitive verb

or British fertilise

ˈfərt-ᵊl-ˌīz 

fertilized or British fertilised; fertilizing or British fertilising