名詞 diaphragm:

1. a mechanical device in a camera that controls size of aperture of the lens
   同義詞：stop
2. (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
   同義詞：midriff
3. a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix
   同義詞：pessary, contraceptive diaphragm
4. electro-acoustic transducer that vibrates to receive or produce sound waves

1. The diaphragm is between the chest and the abdomen.
   橫隔膜位于胸腔與腹部之間。

di.a.phragm

n.（名詞）
Anatomy A muscular membranous partition separating the abdominal and thoracic cavities and functioning in respiration.Also called midriff
【解剖學】 橫隔膜：一種分隔胸腔和腹腔并起呼吸作用的肌性膜隔也作 midriff
A membranous part that divides or separates.
隔膜，隔板：一個分開的膜和薄分隔板
A thin disk, especially in a microphone or telephone receiver, that vibrates in response to sound waves to produce electric signals, or that vibrates in response to electric signals to produce sound waves.
膜片，振動板：一種薄的圓盤（尤其是在麥克風和電話收話器里那種）響應聲波振動產(chǎn)生信號或者響應電信號振動產(chǎn)生聲波
A contraceptive device consisting of a thin flexible disk, usually made of rubber, that is designed to cover the uterine cervix to prevent the entry of sperm during sexual intercourse.
子宮帽避孕套：通常由薄橡皮膜制成的套在子宮頸上的帽，以避免性交過程中精子的進入
A disk having a fixed or variable opening used to restrict the amount of light traversing a lens or optical system.
光圈：具有固定或可變孔的圓盤，用來限制穿過透鏡或光學系統(tǒng)的光量

來源：
Middle English diafragma
中古英語 diafragma
from Late Latin diaphragma [midriff]
源自 后期拉丁語 diaphragma [橫隔膜]
from Greek [partition]
源自 希臘語 [分割]
from diaphrassein [to barricade]
源自 diaphrassein [設路障]
dia- [intensive pref.] * see dia-
dia- [細致的] *參見 dia-
phrassein phrag- [to enclose]
phrassein phrag- [包圍]

【引伸】
di.aphragmat.ic
di.aphragmat.ically
adv.（副詞）