IPA: //kɒtɪˈliːdənəri//
KK: /kɒtɪˈliːdənəri/
Relating to or having a cotyledon, which is the first leaf or leaves that appear from a seed during germination.
The cotyledonary leaves of the plant were the first to emerge from the soil.
Cotyledonary is formed from "cotyledon" (from Greek "kotyledon", meaning cup or hollow) and the suffix "-ary" (meaning pertaining to or connected with). The term refers to something that is related to or characteristic of cotyledons, which are the first leaves that appear from a germinating seed.
Think of 'cotyledon' as the 'first leaves' of a plant, and '-ary' means 'pertaining to'. So, cotyledonary describes something related to those first leaves.