在英语单词解释后边的"v.au.x."(不知道还是“v.au.r.")表示什么意思？

the auxiliary verb

(缩写为 v. aux.)

助动词的意思

应该是v.aux，是表示词语的词性
v = 动词，verb
v (aux) = auxiliary verb 助动词

下面是比较全的词性缩写列表prep = 介词，前置词，preposition
pron = 代词，pronoun

n = 名词，noun
n(c) = 可数名词 countable noun
n(u) = 不可数名词 uncountable noun

v = 动词，verb
vi = 不及物动词，intransitive verb
vt = 及物动词，transitive verb

v (aux) = auxiliary verb 助动词
v (l) = linking verb 系动词
v (m) = main verb 实意动词
v (mo) = modal verb 情态动词
phrasal verb 动词短语

a = 形容词，adjective
ad = 副词，adverb
art = 冠词，article
num = 数词，numeral
int = 感叹词，interjection
conj = 连接词 ，conjunction

s = 主词
sc = 主词补语
o = 受词
oc = 受词补语

pl = 复数，plural
abbr = 缩写词 abbreviation

结核杆菌

应该是v.aux，是表示词语的词性
v = 动词，verb
v (aux) = auxiliary verb 助动词

下面是比较全的词性缩写列表prep = 介词，前置词，preposition
pron = 代词，pronoun