Definition of rhomboid
: a parallelogram with no right angles and with adjacent sides of unequal length
Did You Know?
Rhomboids, like triangles, may take various different shapes, but they always look like a lopsided diamond or rectangle. As both a noun and an adjective, rhomboid can be applied to anything with those shapes, such as certain muscles of the upper back when viewed from behind. Whenever you hear about rhomboid exercises, rhomboid strain, or rhomboid pain, it involves those muscles, which attach your shoulder blades to your spine and can be strained by carrying a heavy backpack, serving a tennis ball, or just slumping in your chair in front of a computer all day.
Origin and Etymology of rhomboid
Medieval French rhomboïde, from Latin rhomboides, from Greek rhomboeidēs resembling a rhombus, from rhombos
First Known Use: 1570
First Known Use of rhomboid
Variants of rhomboid
RHOMBOID Defined for English Language Learners
Definition of rhomboid for English Language Learners
geometry : a shape with four sides where only the opposite sides and angles are equal
Learn More about rhomboid
Seen and Heard
What made you want to look up rhomboid? Please tell us where you read or heard it (including the quote, if possible).