IPA: /dɪˈsɪdʒuəs/
KK: /dɪˈsɪdʒuəs/
Referring to plants or trees that lose their leaves in the fall and grow new ones in the spring.
The deciduous trees in the park change color beautifully in autumn.
Deciduous is formed from "deciduus" (from Latin, meaning falling off) and the suffix "-ous" (meaning full of or having the quality of). The word describes trees or plants that shed their leaves annually, hence, they are characterized by the quality of falling off their leaves.
Think of trees that are 'full of' ('-ous') leaves that 'fall off' ('deciduus') each year — that's what deciduous means.