rhom·​boid | \ ˈräm-ˌbȯid How to pronounce rhomboid (audio) \

Definition of rhomboid

 (Entry 1 of 2)

: a parallelogram with no right angles and with adjacent sides of unequal length


rhom·​boid | \ ˈräm-ˌbȯid How to pronounce rhomboid (audio) \
variants: or rhomboidal \ räm-​ˈbȯi-​dᵊl How to pronounce rhomboid (audio) \

Definition of rhomboid (Entry 2 of 2)

: shaped somewhat like a rhombus or rhomboid

Illustration of rhomboid

Illustration of rhomboid


In the meaning defined above

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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.

Examples of rhomboid in a Sentence

Recent Examples on the Web: Noun His 237,000-square-foot translucent glass construction features terrazzo details and a curve used by Mies in the original building, while its striking rhomboid shape corresponds to the street edges. Leena Kim, Town & Country, "Houston's Museum of Fine Arts Is Proof That Everything Really Is Bigger In Texas," 23 Oct. 2020 That's because strengthening your back muscles—think your lats, rhomboids, and traps—help improve muscle imbalances and posture. Christa Sgobba, SELF, "You Need This Dumbbell Back Workout If You've Been Sitting All Day," 3 Apr. 2020 Kids can build an infinite number of designs using just five triangles, one square and one rhomboid. cleveland, "Fun and educational games, activities to save your sanity during coronavirus school break," 16 Mar. 2020 Most of the muscles that people really need to strength-train — hamstrings, glutes, lower back, rhomboids, triceps — are not really worked during rock climbing. Kate Dwyer, New York Times, "Social Climbing Has a Whole New Meaning," 14 Nov. 2019 Lat Pull with Arm Rotation Lat pulls work your lats, mid traps, and rhomboids, says Braithwaite. Leah Prinzivalli, SELF, "Jennifer Lopez's 8-Move Arm and Back Workout Is a Total-Body Challenge," 5 Oct. 2018 The shoulder stabilizer muscles, located in the upper back area, include the trapezius, serratus anterior, and the rhomboids. Jenny Mccoy, SELF, "Strengthen Your Shoulders and Core With This Plank Workout From Jennifer Garner’s Trainer," 30 Apr. 2018 Phil for Phil Right-hander Phil Maton (lat) also rejoined the Padres from his rehab assignment at Double-A San Antonio as right-hander Phil Hughes hit the disabled list with a right rhomboid strain. Jeff Sanders, sandiegouniontribune.com, "Tyson Ross reaching back for more when he needs it," 22 June 2018 Arranged in an unruly way calculated to appeal to kids’ anarchic tastes, the cards read as diamonds and rhomboids, nicely unifying the room’s design. Long-shot theory: Perhaps Ms.... Dale Hrabi, WSJ, "A Debate Over a Children’s Study Nook," 11 May 2017 Recent Examples on the Web: Adjective Rest is the initial plan for outfielder Max Kepler, who missed much of September because of a rhomboid strain — although Falvey said that Kepler will see a specialist. Betsy Helfand, Twin Cities, "Twins hope to retain coaching staff but might have competition," 9 Oct. 2019 McIlroy said the injury is to a rhomboid muscle on the left side of his body. Rick Bonnell, charlotteobserver, "Is Rory McIlroy done for the year? Injury causing spasms, numbness," 13 Aug. 2017 McIlroy, 28, punctuated a quiet week with a 68, his first sub-70 round of the tournament, and then said a lingering rib injury — a spasming left rhomboid muscle, to be precise — could sideline him indefinitely. Karen Crouse, New York Times, "Justin Thomas Wins the P.G.A. Championship, His First Major Title," 13 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rhomboid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rhomboid


1570, in the meaning defined above


1681, in the meaning defined above

History and Etymology for rhomboid


Middle French rhomboïde, from Latin rhomboides, from Greek rhomboeidēs resembling a rhombus, from rhombos

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Time Traveler for rhomboid

Time Traveler

The first known use of rhomboid was in 1570

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Statistics for rhomboid

Cite this Entry

“Rhomboid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rhomboid. Accessed 7 Mar. 2021.

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More Definitions for rhomboid



English Language Learners Definition of rhomboid

geometry : a shape with four sides where only the opposite sides and angles are equal

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