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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. The end of a long bone that is originally separated from the main bone by a layer of cartilage but later becomes united to the main bone through ossification.
  2. n. See pineal gland.

Century Dictionary and Cyclopedia

  1. n. In anatomy: A part or process of bone which has its own center of ossification separate from the main center of the shaft or body of the bone, and which therefore only gradually joins the rest of the bone by the progress of ossification: so called because it grows upon the body of the bone. Thus, the end of a long bone, as the humerus or femur, has for a while a gristly cap of cartilage, which ossifies separately from one or several ossific centers, and finally coössifies with the shaft. An epiphysis is properly distinguished from an apophysis, or mere bony process or outgrowth without independent ossific center, being always autogenous or endogenous, and not merely exogenous; but the distinction is not always observed, especially as a completed and coossified epiphysis cannot be recognized as such with certainty. See cut under endoskeleton.
  2. n. Some part or organ that grows upon or to another.
  3. n. A small superior piece of each half of an alveolus of a sea-urchin, united below to its own half of the alveolus, joined to its fellow of the other half of the same alveolus, and connected by the rotula with the epiphysis of another alveolus. See lantern of Aristotle, under lantern.

Wiktionary

  1. n. anatomy The pineal gland.
  2. n. anatomy The rounded end of any long bone.

GNU Webster's 1913

  1. n. The end, or other superficial part, of a bone, which ossifies separately from the central portion, or diaphysis.
  2. n. The cerebral epiphysis, or pineal gland. See Pineal gland, under pineal.

WordNet 3.0

  1. n. a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
  2. n. the end of a long bone; initially separated from the main bone by a layer of cartilage that eventually ossifies so the parts become fused

Etymologies

  1. Greek epiphusis, an excrescence : epi-, epi- + phusis, growth; see bheuə- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

  • “Veeramani made her way through the earlier rounds Friday night, spelling "epiphysis" and "juvia" with ease.”

    The Washington Post: Ohio student wins bee

  • “Our expert team treats hip disorders and deformities such as hip dysplasia and dislocation, slipped capital femoral epiphysis, Legg-Calve-Perthes disease, infection and chondrolysis.”

    Our Services

  • “It was the newest rod available, and it threaded into the epiphysis, whatever that was, which kept it from migrating, like the older rods used to.”

    Simon & Schuster: Handle with Care

  • “A radial epiphysis the growth ends of the other forearm bone.”

    Simon & Schuster: Smoke, Mirrors, and Murder

  • “He argued that the “worm-like appendage” [epiphysis or apophysis] of the cerebellum (nowadays known as the vermis superior cerebelli) is much better qualified to play this role (Kühn 1822, pp. 674-683; May 1968, vol. 1, pp. 418-423).”

    Descartes and the Pineal Gland

  • “The vertebrae on the inside are regularly placed upon one another, but behind they are connected by a cartilaginous ligament; they are articulated in the form of synarthrosis at the back part of the spinal marrow; behind they have a sharp process having a cartilaginous epiphysis, whence proceeds the roots of nerves running downward, as also muscles extending from the neck to the loins, and filling the space between the ribs and the spine.”

    Instruments Of Reduction

  • “Sometimes the epiphysis is displaced, and sometimes there is displacement (diastasis) of the one bone from the other.”

    Instruments Of Reduction

  • “The head of the humerus is articulated with its (glenoid?) cavity, by means of a small ligament, and it consists of a rounded epiphysis composed of spongy cartilage, the humerus itself is bent outward and forward, and it is articulated with its (glenoid?) cavity by its side, and not in a straight line.”

    Instruments Of Reduction

  • “When the foot is dislocated, either alone, or with the epiphysis, the displacement is more apt to be inward.”

    Instruments Of Reduction

  • “And the cases in which the articular cavity has been broke off, and in which the ligament has been torn, and in which the epiphysis has broken in which, and how, when the limb consists of two bones, one or both are broken: in consequence of these the dangers, chances in which bad, and when the injuries will result in death, and when in recovery.”

    Instruments Of Reduction

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antonyms (1)

Words with the opposite meaning

  1. diaphysis

hypernyms (5)

Words that are more generic or abstract

  1. endocrine gland
  1. endocrine
  1. ductless gland
  1. long bone
  1. os longum

reverse dictionary (15)

Words that contain this word in their definition

  1. intra-epiphyseal
  2. epiphyses
  3. epiphyseal
  1. epiphysis
  2. epiphyseolysis
  3. epiphysitis
  1. paraphysis
  2. supra-ilium
  3. epiphysial
  1. pineal gland
  2. diastasis
  3. metaphysis
  1. ankylosis
  2. apophysis
  3. tibiotarsus

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‘epiphysis’ has been looked up 1701 times, added to 8 lists, and has a Scrabble score of 19.