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A splint is a stiff flat piece — wood, plastic, metal, sometimes just a rolled-up magazine in an emergency — tied along a broken arm or leg to hold the bone still while it . Holding it still is the whole idea: a bone can only knit back together if the two ends stay where they are.
A splint is夾板是a stiff flat piece一塊硬硬扁扁的東西——wood, plastic, metal木頭、塑膠、金屬，sometimes just a rolled-up magazine in an emergency有時緊急狀況下就用捲起來的雜誌也行——tied along綁在a broken arm or leg斷掉的手臂或腿上，while it mends趁著癒合的時候to hold the bone still讓骨頭固定不動。Holding it still固定不動is the whole idea就是整個重點：if the two ends只要兩端stay where they are保持在原位，a bone骨頭can only knit back together才能癒合起來。
A splint is not the same as a plaster cast. A cast is wet plaster or wrapped all around the limb and left to harden, and it stays on for weeks; a splint is laid along one side and tied on, so it can be taken off and put back, and it is often what you use first, right where the accident happened, before the person gets to a hospital.
A splint夾板a plaster cast跟石膏固定is not the same as不一樣。A cast is石膏是wet plaster or fibreglass濕的石膏或玻璃纖維wrapped all around the limb整個包住肢體and left to harden讓它變硬，and it stays on for weeks而且要戴好幾個星期；a splint夾板則is laid along one side是貼在一側and tied on綁起來，so it can be taken off and put back所以可以拿下來再裝回去，right where the accident happened就在事故發生的現場，before the person gets to a hospital在送到醫院之前，and it is often what you use first常常是最先用的。
Dentists also use the word for a small piece worn over the teeth at night, and a horse can wear one too.
Dentists牙醫also use the word也用這個字for a small piece指一種小東西worn over the teeth at night晚上戴在牙齒上的，and a horse can wear one too馬也可以戴一個。
As a verb, to splint something means to put a splint on it: 'They splinted his leg before moving him.'
As a verb當動詞用，to splint something幫某個東西上夾板means意思就是to put a splint on it把夾板裝上去。'They splinted his leg before moving him.'（他們在移動他之前先幫他的腿上了夾板。）
組成A very old Germanic word, from Middle Low German or Middle Dutch, going all the way back to a root meaning 'to split'. That fits what a splint first was: a thin flat piece split off a bigger piece of wood.
原始詞典資料12 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
splintnoun/splɪnt/
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A narrow strip of wood split or peeled from a larger piece.
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A narrow strip of wood split or peeled from a larger piece.
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dentistrymedicinesciencesA dental device applied consequent to undergoing orthodontia.
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medicinesciencesA device to immobilize a body part.
- [...] I saw in the white men's ward that little chap tossing on his back, with his arm in splints, and quite light-headed.
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historicalgovernmentmilitarypoliticsA segment of armour consisting of a narrow overlapping plate.
- The fore-part of his thighs, where the folds of his mantle permitted them to be seen, were also covered with linked mail; the knees and feet were defended by splints, or thin plates of steel, ingeniously jointed upon each other; and mail hose, reaching from the ancle to the knee, effectually protected the legs, and completed the rider's defensive armour.
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businessminingSynonym of splent coal.
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biologynatural-scienceszoologyA bone found on either side of a horse's cannon bone; the second or fourth metacarpal (forelimb) or metatarsal (hindlimb) bone.
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biologymedicinenatural-sciencesA disease affecting the splint bones, as a callosity or hard excrescence.
splintverb/splɪnt/
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To apply a splint to; to fasten with splints.
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To support one's abdomen with hands or a pillow before attempting to cough.
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To press fingers against the vaginal wall to ease defecation.
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obsoleterareTo split into thin, slender pieces; to splinter.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。