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jmdict 2866301 Active (id: 2350567)
乳溝
にゅうこうちちみぞ
1. [n] {zoology}
▶ mammary slit (in whales, dolphins and porpoises)
2. [n] [sl]
《esp. ちちみぞ》
▶ cleavage (between breasts)



History:
5. A 2025-11-03 02:54:53  Jim Breen <...address hidden...>
4. A* 2025-11-02 23:41:03  Robin Scott <...address hidden...>
  Comments:
Not many web hits for "mammary cleft".
Sense 2 is surely slang.
  Diff:
@@ -15,3 +15,2 @@
-<field>&biol;</field>
-<gloss>mammary slit (e.g. in whales and dolphins)</gloss>
-<gloss>mammary cleft</gloss>
+<field>&zool;</field>
+<gloss>mammary slit (in whales, dolphins and porpoises)</gloss>
@@ -20,0 +20 @@
+<misc>&sl;</misc>
@@ -22,2 +22 @@
-<gloss>cleavage</gloss>
-<gloss>space between the breasts</gloss>
+<gloss>cleavage (between breasts)</gloss>
3. A 2025-07-08 05:06:21  Jim Breen <...address hidden...>
  Diff:
@@ -16 +16,8 @@
-<gloss>mammary slit</gloss>
+<gloss>mammary slit (e.g. in whales and dolphins)</gloss>
+<gloss>mammary cleft</gloss>
+</sense>
+<sense>
+<pos>&n;</pos>
+<s_inf>esp. ちちみぞ</s_inf>
+<gloss>cleavage</gloss>
+<gloss>space between the breasts</gloss>
2. A* 2025-06-29 15:56:04 
  Diff:
@@ -8 +8,4 @@
-<reb>にゅうこうちちみぞ</reb>
+<reb>にゅうこう</reb>
+</r_ele>
+<r_ele>
+<reb>ちちみぞ</reb>
1. A* 2025-06-28 02:36:57  Morg <...address hidden...>
  Refs:
https://www.kaikyokan.com/cms/cp_sealife/dolphin185/
https://dic.pixiv.net/a/乳溝 (meaning 1)
  Comments:
The pixiv entry mentions the reading as ちちみぞ which I added as secondary reading, however in biology I believe this to be normally read にゅうこう as in this video: https://youtu.be/d24yhIMYPsM?t=30

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