There are a few new words in this poem that I looked up.

Halcyon sea - It means peaceful sea.

Vair - This is a type of squirrel fur.

Dias - A raised platform in a large room that people stand on to speak in front of an audience.

BY CHRISTINA ROSSETTI

My heart is like a singing bird

Whose nest is in a water'd shoot;

My heart is like an apple-tree

Whose boughs are bent with thickset fruit;

My heart is like a rainbow shell

That paddles in a halcyon sea;

My heart is gladder than all these

Because my love is come to me.

Raise me a dais of silk and down;

Hang it with vair and purple dyes;

Carve it in doves and pomegranates,

And peacocks with a hundred eyes;

Work it in gold and silver grapes,

In leaves and silver fleurs-de-lys;

Because the birthday of my life

Is come, my love is come to me.