The phrase 'floating heart' is correct and usable in written English.
You can use it as a metaphor for describing a feeling of joy or love, for example, "She was filled with a floating heart as she watched her son walk across the stage to receive his diploma."
The genus Nymphoides, known for its fringed water lily, water snowflake, and floating heart, comprises submerged plants with buried rootstalks and floating leaves.
She was the great philosopher of love and la vie sexuelle, and, paradoxically, nowhere more so than in the slim novel in which she bids fond farewell to fleshly pleasures and romantic adventures – "I have paid for my folly, shut away the heady young wine that intoxicated me, and folded up my big, floating heart" – in favour of an equally voluptuous pantheism.
5. Upcycle a jar into a floating heart snow globe Project via My Thrift Store Addiction.
The first level showcases the greatest hits of perennial Tiffany collections: gloopy floating hearts by Elsa Peretti; bold, knobby shapes by Paloma Picasso.
Four years ago, officials surrendered to the inevitable and the field has returned to woodland kettle pond, with floating hearts -- pads with small yellow flowers -- covering much of its surface.
It already showed one off with a "Go Vote" airhorn this Sunday, and has now added flashlight, snow, floating hearts, and other World Lenses.
Google is serving up a different doodle for international visitors, which features a mix-your-own box of chocolates that you can then actually send to your sweetie, and the company is also adding animated floating hearts to your Google+ photo uploads depicting hugging and kissing.
The playful additions are reminiscent of Periscope's floating hearts and Instagram's photo filters.
See How to Make Floating Hearts from Plastic Straws for a few more pictures and details.
For details on sealing the end of the straw, see Make Floating Hearts from Plastic Straws.
"Daddy's Little Girl" (2000) depicts an awkward-looking young girl surrounded by floating valentine hearts.
