King's Kung-Fu& Tai Chi

Japanese symbol for “medulla”

Romaji: kotsuzui
bone marrow; medulla

In Japanese, medulla is , read (kotsuzui).

Before using these characters for a tattoo, check them with a native speaker. Dictionary words often have several meanings, and the right choice depends on context.

Meanings

  1. n bone marrow; medulla (anat)
  2. n heart's core; depths of one's heart
  3. n main point; vital part

Kanji and stroke order

skeleton, bone, remains
on: コツ
kun: ほね
10 strokes · JLPT 2
marrow, pith, essence
on: ズイ
19 strokes · JLPT 1

Other Japanese words for “medulla”

WordReadingMeaning
ずい zuimedulla; pith
ずいしつ zuishitsumedulla
もくずい mokuzuipith; medulla

Related words

Words that share a kanji.

WordReadingMeaning
こっせつ kossetsubone fracture
ろこつ rokotsuopen; unconcealed; undisguised
てっこつ tekkotsusteel frame; steel beam; steel girder
こっかく kokkakuskeleton; skeletal structure; build
せぼね sebonespine; backbone; spinal column
いこつ ikotsucremated remains (esp. the bones); ashes
せきずい sekizuispinal cord
しんずい shinzuiessence; quintessence; spirit

See also: Chinese symbol for “medulla”.

Data: JMdict (CC BY-SA 4.0); KANJIDIC2 (CC BY-SA 4.0); KanjiVG (CC BY-SA 3.0); wordfreq (CC BY-SA 4.0 (data)). Retrieved 2026-10-22.