1
colorectal + noun
colorectal 为形容词，作定语修饰名词，表示“结肠直肠的”。常见搭配如 colorectal cancer（结直肠癌）、colorectal surgery（结直肠手术）。
Colorectal cancer is one of the most common cancers in the world.
结直肠癌是世界上最常见的癌症之一。
结肠直肠的
先理解核心含义，再看它在真实句子里的用法。
结肠直肠的
relating to or affecting the colon and the rectum
Colorectal cancer is one of the most common cancers in the world.
结直肠癌是世界上最常见的癌症之一。
属于或关于结直肠的
Of or pertaining to the colorectum.
The doctor recommended a colorectal screening after the age of fifty.
医生建议五十岁以后做结直肠癌筛查。
Colorectal health can be improved with a diet rich in fiber.
富含纤维的饮食可以改善结直肠健康。
She read a brochure about colorectal cancer prevention at the clinic.
她在诊所阅读了一本关于预防结直肠癌的小册子。
colorectal 为形容词，作定语修饰名词，表示“结肠直肠的”。常见搭配如 colorectal cancer（结直肠癌）、colorectal surgery（结直肠手术）。
Colorectal cancer is one of the most common cancers in the world.
结直肠癌是世界上最常见的癌症之一。
Not this
He was diagnosed with colorectum cancer.
Use this
He was diagnosed with colorectal cancer.
colorectum 是名词，表示“结肠和直肠”，不能像形容词那样作定语修饰 cancer；修饰名词应用形容词 colorectal。
Not this
The doctor treated her colorectal for two years.
Use this
The doctor treated her colorectal cancer for two years.
colorectal 是形容词，不能单独作宾语表示“结直肠疾病/癌症”；表达“治疗结直肠癌”时须说 treat colorectal cancer。
Not this
Large intestine cancer is common in older adults.
Use this
Colorectal cancer is common in older adults.
汉语“大肠癌”直译为 large intestine cancer，但英语医学常用形容词 colorectal；large intestine 虽有同等指称，但在这一固定搭配中不自然。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
结直肠癌
Regular screening can reduce the risk of colorectal cancer.
定期筛查可以降低结直肠癌的风险。
结直肠癌筛查
Colorectal screening is recommended for adults over 50.
建议50岁以上的成年人进行结直肠癌筛查。
结直肠外科手术
The patient was referred to a specialist for colorectal surgery.
患者被转诊给专家进行结直肠外科手术。
结直肠外科医生
A colorectal surgeon explained the procedure to us.
一位结直肠外科医生向我们解释了手术过程。
结直肠息肉
The doctor removed a small colorectal polyp during the colonoscopy.
医生在结肠镜检查中切除了一颗小的结直肠息肉。
结直肠疾病
This hospital specializes in treating colorectal disease.
这家医院专门治疗结直肠疾病。
Use colorectal naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
拆开记：colo=结肠，rect=直肠，-al=形容词后缀；合起来就是‘结肠直肠的’，想象体检单上同时圈出这两段。
语域：formal 常见场景：医学文献、临床报告、学术论文 该词为医学术语，通常用于正式或专业语境，如医学文献、临床报告和学术论文；日常口语中很少使用。
Only 'rectal' (/ˈrektəl/) rhymes with 'colorectal' (/ˌkəʊləˈrektəl/) because both end in the stressed /rektəl/ sound. 'colon' (/ˈkəʊlən/) shares the first syllable /kəʊl/ but not the ending. 'colonial' (/kəˈləʊniəl/), 'colony' (/ˈkɒləni/), and 'colour' (/ˈkʌlə/) look similar at the start but have different vowels and rhythm. 'correct' (/kəˈrekt/) shares the /rekt/ sound but lacks the final /əl/, so it does not rhyme with the full word.
Dictionary facts from ECDICT, WIKTIONARY.