| 序号 | 英文 | 音标 | 词性 | 中文 |
| | buttermilk | 5bQtEmilk | n. | [食]酪乳, 白脱牛奶 |
| | buttermilk cheese | | | 酪乳干酪 |
| | buttermilk skin | | | 小牛皮 |
| | buttermilk vat | | | 酪乳槽 |
| | butternut | 5bQtEnQt | n. | 白脱奶特白胡桃的一种 |
| | butterpaste | | | 牛油与面包粉揉成的糊状物 |
| | butterscotch | 5bQtEskCtF | n. | (咸味)奶油糖果 |
| | butterscotch ice cream | | | 咸味奶油冰淇淋 |
| | butterweed | | | 千里光属植物 |
| | butterwort | `bQtEw\:t | n. | [植]捕虫堇 |
| | buttery | 5bQtEri | n.；adj. | n. 食品室, 酒贮藏室；adj. 像黄油样的, 奉承的 |
| | buttery hatch | | n. | 食堂供传递食物用的小窗口 |
| | buttery texture | | | 似奶油状的纹理组织(冰淇淋的缺陷) |
| | buttgenbachite | 5bQtdVEn7bAkait | | 毛青铜矿 |
| | butting | 5bQtiN | | 用头撞人(犯规动作) |
| | butting collision | | | 列车尾追撞车（冲突） |
| | buttinski | bQ5tinski | | 装有拨号盘和送受话器的试验器 |
| | buttinsky | bQ5tinski | n. | <俚>爱管闲事的人(亦作buttinski) |
| | buttjunction | | | 对(抵) 接(头), 对齐接头 |
| | buttle | 5bQtEl | vi. | <谑>做男管家(或男仆) |
| | buttlegger | `bQt9legE(r) | n. | <美>(逃税的)不法香烟贩子 |
| | buttlegging | `bQt9legIN | n. | <美>偷税漏税贩运香烟 |
| | buttless thread | | | 锯齿螺纹 |
| | buttock | 5bQtEk | n.；vt. | n. 屁股的一半, 屁股, 船尾；vt. 背摔 |
| | buttock getter | | | [采矿]机窝采煤机 |
| | buttocks | | n. | 臀部 |
| | buttomangrove | 5bQtEmAngrEuv | | 直立锥果木 |
| | button | 5bQtn | n.；v. | n. 钮扣, [计]按钮；v. 扣住, 扣紧 |
| | button barrel lamp | | | 按钮表示灯 |
| | button capacitor | | | 微型电容器 |
| | button cell | | | 扣式电池, 微型电池 |
| | button cell battery | | | 扣式电池 |
| | button contact | | | 按钮接点 |
| | button control route interlocking | | | 按钮式进路(集中)联锁 |
| | button die | | | 模具镶套 |
| | button die retainer | | | 钮扣式冲模固定板 |
| | button down | | | 把...弄清楚 |
| | button face | | n. | 按钮字体, 按钮底色 |
| | button head snap | | | 半圆头铆钉窝子 |
| | button headed bolt | | | 半圆头螺栓 |
| | button highlight | | n. | [计]按钮突出, 按钮突出显示 |
| | button in condensed milk | | | 炼乳中的结块 |
| | button lac | | | 钮状虫胶(即精制虫胶) |
| | button left | | | 表把向左, 柄左 |
| | button man | | n. | 爪牙, 枪手 |
| | button marking | | | 按钮标记 |
| | button mold | | n. | 包钮 |
| | button mounting | | | 小型精体座 |
| | button mushroom | | n. | 未张开的蘑菇 |
| | button panel | | | 按钮型控制板 |
| | button plate | | | 凸点钢板 |
| | button set | | | 按钮组 |
| | button shadow | | n. | [计]按钮阴影 |
| | button sizer | | | 钮扣自选机 |
| | button socket | | | 按钮灯口 |
| | button speck | | | 钮斑 |
| | button stem | | | 微型管心柱, 微型管基 |
| | button text | | n. | [计]按钮文字 |
| | button up | | | 扣住, 守口如瓶 |
| | button up one's lip | | v. | 保守秘密 |
| | button up one's mouth | | v. | 保持沉默 |
| | button weights | | | 试金砝码 |
| | button-down | `bQtEndaun | adj. | <美>领尖钉有钮扣的,守旧的,温文尔雅的 |
| | button-on | `bQtEnCn | adj. | 用钮扣扣上去的 |
| | buttonball | | | (=button wood)悬条木属的植物 |
| | buttonbush | `bQtEnbuF | n. | [植]风箱树(茜草科风箱树属植物,灌木或小乔木,不少于6种) |
| | buttoned | | | 用钮扣装饰的, 扣紧的 |
| | buttoned up | | adj. | 守口如瓶的 |
| | buttoner | | | 扣扣人 |
| | buttonhold | `bQtEnhEuld | vt. | <古>强留(人)谈(或听) |
| | buttonholder | | n. | 强留人谈话者 |
| | buttonhole | 5bQtnhEul | n. | 钮扣孔 |
| | buttonhole maker | | | 锁眼机 |
| | buttonhole stitch | | n. | 镶边的针脚 |
| | buttonhook | | | 钮扣钩 |
| | buttoning | 5bQtniN | | 圆钮定位法 |
| | buttonless | `bQtEnlIs | adj. | 没有钮扣的 |
| | buttonmold | | | 钮模 |
| | buttonon | | | 用钮扣扣上去的 |
| | buttony | `bQtEnI | adj. | 钮扣状的, 多钮扣的 |
| | buttress | 5bQtris | n.；vt. | n. (建筑)扶壁, 支持物；vt. 支持, (以扶壁)扶住 |
| | buttress brace | | | 支撑刚性梁, 加劲[强]梁, 垛间支撑梁 |
| | buttress dam | | | 支墩坝 |
| | buttress root | | | [植]板(状)根 |
| | buttress sands | | | [地质]支撑砂层 |
| | buttress thread | | | 偏梯形螺纹, 锯齿螺纹, 直三角螺纹, 倒牙螺纹 |
| | buttress thread screw | | | 斜梯形纹螺钉 |
| | buttress up | | v. | 支持, 支撑 |
| | buttressed base root | | | 板状基根, 支柱基板根 |
| | buttressing effect | | | 支撑效应 |
| | butts and bound | | | [律]地界, 地端对接 |
| | buttstock | `bQtstCk | n. | 枪托 |
| | buttstrap | 5bQt7strAp | | 对接搭板, 平接盖板 |
| | buttter worker | | | 奶油工人 |
| | butty | 5bQti | n. | 伙伴, 监工 |
| | butty gang | | | 合伙工作队 |
| | butul ricinoleate | | | 蓖酸丁酯 |
| | butut | bu`tu:t | n. | 布图(冈比亚辅币名) |
| | butvar | 5bQtvB: | | 布特伐尔(聚乙烯醇缩丁醛塑料的俗名) |
| | butyl | 5bju:til | n. | 丁基, 丁基合成橡胶 |
| | butyl acetoacetic ester | | | 乙酰丁基乙酸酯 |