名詞 coma:

1. a state of deep and often prolonged unconsciousness; usually the result of disease or injury
   同義詞：comatoseness
2. a usually terminal tuft of hairs especially on a seed
3. (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed

1. After a long coma the sick man slowly came back.
   昏睡了好久以后，那個病人慢慢地恢復(fù)了活力。
2. The girl went into a coma after the car accident three months ago, and has not woken up yet.
   3個月前，汽車出事故以后，這個姑娘就昏迷過去了，至今還沒有蘇醒過來。
3. She lapsed into a coma.
   她逐漸陷入昏迷狀態(tài)。
4. He was in a coma for days, but now he's (fully) conscious again.
   他昏迷了幾天，但現(xiàn)在又(完全)清醒了。

coma

n.（名詞）
【復(fù)數(shù)】 co.mas
A state of deep, often prolonged unconsciousness, usually the result of injury, disease, or poison, in which an individual is incapable of sensing or responding to external stimuli and internal needs.
昏迷：一種很深且通常是持續(xù)的失去知覺的狀態(tài)，常因受傷、疾病或中毒引起，在昏迷中的人不能感覺且對外界刺激或內(nèi)部需求沒有反應(yīng)

來源：
Greek kôma [deep sleep]
希臘語 kôma [沉睡]

coma
coma 2

n.（名詞）
【復(fù)數(shù)】 co.mae[-mô]
Astronomy The nebulous, luminescent cloud containing the nucleus and constituting the major portion of the head of a comet.
【天文學(xué)】 彗發(fā)：星云狀的發(fā)光云體包括彗核、彗星頭部的重要部分
Botany A usually terminal tuft or cluster, especially a tuft of hairs on a seed, as on a willow or milkseed.
【植物學(xué)】 種毛：在某些樹木如柳樹或乳草種子上的一簇毛
Physics A diffuse, pear-shaped image of a point source.
【物理學(xué)】 基于一點(diǎn)呈散開的、梨狀的一種表現(xiàn)形式

來源：
Latin [hair]
拉丁語 [頭發(fā)]
from Greek komô
源自 希臘語 komô

【引伸】
co.mal
adj.（形容詞）