developmental

adjective

de·​vel·​op·​men·​tal dē-ˌve-ləp-ˈmen-tᵊl 

1

a

: of, relating to, or being development

developmental processes

developmental biology

broadly : experimental sense 2

developmental aircraft

b

: serving economic development

developmental highways

2

: designed to assist growth or bring about improvement (as of a skill)

developmental toys

developmentally

dē-ˌve-ləp-ˈmen-tᵊl-ē 

adverb

Synonyms

• experimental
• pilot
• trial

Examples of developmental in a Sentence

A drop in temperature can slow the plant's developmental process.

a child with developmental abnormalities

My theory is still in its developmental stage.

Recent Examples on the Web

Finally, Cella found a developmental pediatrician who was more optimistic. —Laura Tillman, Hartford Courant, 16 June 2025

The Magic didn’t need to add more developmental players in the next two drafts. —John Hollinger, New York Times, 16 June 2025

But there were negligible to small associations with the other developmental outcomes including social-emotional, cognitive, language and physical maturation. —Kristen Rogers, CNN Money, 16 June 2025

That excitement, however, was tempered by our concerns about Alex’s developmental delays. —James Ponti, People.com, 15 June 2025

Word History

First Known Use

1830, in the meaning defined at sense 1a

Phrases Containing developmental

• developmental biology
• developmental disability
• developmental disorder
• evolutionary developmental biology
• pervasive developmental disorder

Rhymes for developmental

• coincidental
• environmental
• experimental
• intersegmental
• nongovernmental
• transcontinental
• unsentimental
• accidental
• compartmental
• continental
• detrimental
• elemental

Kids Definition

developmental

adjective

de·​vel·​op·​men·​tal -ˌvel-əp-ˈment-əl 

: of or relating to development

developmentally

-əl-ē 

adverb