| LAC | Linear Absorption Coefficient | 线性吸收系数 |
| LAC | L2TP Access Concentrator | L2TP访问集中器 |
| LAC | Link Access Control | 链路接入控制 |
| LAC | Local Access Communications (Washington state) | 本地接入通信（华盛顿州） |
| LAC | Leading Air Cadet (Royal Air Cadets) | 首席航空学员（皇家航空学员） |
| LAC | Local Assigned Code | 本地分配代码 |
| LAC | Local Agency Check | 当地机构检查 |
| LAC | Laboratory Advisory Committee | 实验室咨询委员会 |
| LAC | Livestock Advisory Committee | 牲畜咨询委员会 |
| LAC | Low Altitude Cruise | 低空巡航 |
| LAC | Licensed Acupuncturist | 及针灸师 |
| LAC | Limits of Acceptable Change | 可接受变更的限制 |
| LAC | License Agreement Code | 许可协议代码 |
| LAC | Library and Archives Canada | 加拿大图书馆和档案馆 |
| LAC | Local Access Carrier | 本地接入运营商 |
| LAC | Laboratory of Atmospheric Chemistry | 大气化学实验室 |
| LAC | Labor Advisory Committee | 劳工咨询委员会 |
| LAC | Laboratory Academic Committee (China) | 实验室学术委员会（中国） |
| LAC | Liga Antituberculosos Colombiana (Colombian anti-Tuberculosis League) | 哥伦比亚抗结核联盟 |
| LAC | Living Architecture Centre | 生活建筑中心 |
| LAC | Layer 2 Aggregation Concentrator (Hekimian) | 第2层聚合集中器（Hekimian） |
| LAC | Left Antecubital (IV site) | 左肘前（IV部位） |
| LAC | Launch Area Coordinator (TLAM) | 发射区协调员（TLAM） |
| LAC | Launch Azimuth Corridor | 发射方位走廊 |
| LAC | Latin American Countries | 拉丁美洲国家 |
| LAC | Local Area Controller | 当地控制器 |
| LAC | Local Area Communication | 局域网通信 |
| LAC | Legal Assistance Centre (Namibia) | 法律援助中心（纳米比亚） |
| LAC | Lanao Agricultural College | 兰澳农业学院 |
| LAC | Latest Acquisition Cost | 最新购置成本 |
| LAC | Location Area Code (GSM cellular technology) | 位置区域代码（GSM蜂窝技术） |
| LAC | Loop Assignment Center | 循环分配中心 |
| LAC | Long Arm Cast (cast immobilizing wrist and elbow) | 长臂铸造（铸造固定手腕和肘部） |
| LAC | London Aquatic Club | 伦敦水上俱乐部 |
| LAC | Lotus Authorized Consultants | Lotus授权顾问 |
| LAC | Learning Assistance Center | 学习援助中心 |
| LAC | Local Advisory Committee | 当地咨询委员会 |
| LAC | Light Attack Craft (David Weber's Honor Harrington series) | 轻型攻击工艺(大卫韦伯荣誉哈林顿系列) |
| LAC | Low Authority Control | 低权限控制 |
| LAC | Lights Advisory Committee (sea navigation) | 灯光咨询委员会（海上航行） |
| LAC | low amplitude contraction | 低振幅收缩 |
| LAC | Los Angeles Chargers | 洛杉矶充电器 |
| LAC | liver attenuation coefficient | 肝脏衰减系数 |
| LAC | Lose All Communication | 失去所有通信 |
| LAC | light-adapted cone | 光适应锥体 |
| LAC | Light Attack Craft | 轻型攻击艇 |
| LAC | la crosse subtype encephalitis | la crosse亚型脑炎 |
| LAC | Legislative Action Conference | 立法行动会议 |
| LAC | landschutz ascites carcinoma | 兰氏腹水癌 |
| LAC | Lobbying Advertising Campaign | 游说广告活动 |
| LAC | Legislative Audit Commission | 立法审计委员会 |
| LAC | Pulau Layang- Layang, Malaysia | 拉扬岛-拉扬，马来西亚 |
| LAC | Liga Antiterrorista Canaria | 加那利反恐怖组织 |
| LAC | Linear Algebra Classes | 线性代数类 |
| LAC | Longburn Adventist College | 隆本基督复临会学院 |
| LAC | Line Assignment Center | 行分配中心 |
| LAC | Low Ambient Control | 低环境控制 |
| LAC | Lake Athletic Conference | 湖泊运动会议 |
| LAC | Leading Aircraftman | 领先的空中工匠 |
| LAC | Liberal Arts College | 文科学院 |
| LAC | Licensed Addictions Counselor | 持证成瘾顾问 |
| LAC | Latin America and the Caribbean | 拉丁美洲和加勒比地区 |
| LAC | Lemon Administration Committee | 柠檬管理委员会 |
| LAC | Large Animal Clinic | 大型动物诊所 |
| LAC | Licensed Associate Counselor | 执业副顾问 |
| LAC | Lupus Anticoagulant | 狼疮抗凝药 |
| LAC | Los Angeles County | 洛杉矶县 |
| LAC | Los Angeles Clippers | 洛杉矶快船队 |
| LAC | Legislative Action Center | 立法行动中心 |
| LAC | Louisiana Administrative Code | 路易斯安那州行政法规 |
| LAC | Laceration | 撕裂 |
| LAC | Linear Amplifier Circuit | 线性放大器电路 |
| LAC | Local Area Coverage | 局部区域覆盖 |
| LAC | Loud and Clear (Cranberries song) | 响亮而清晰（蔓越莓歌曲） |
| LAC | Little American Car | 小型美国汽车 |
| LAC | Light Armor Company | 轻型装甲公司 |
| LAC | Legislative Action Committee | 立法行动委员会 |
| LAC | Law-Abiding Citizen (band) | 守法公民（乐队） |
| LAC | Licensed Asbestos Consultant | 许可石棉顾问 |
| LAC | Large Anechoic Chamber | 大型消声室 |
| LAC | Leisa Atmospheric Corrector | 莱萨大气校正仪 |
| LAC | Local Authority Circular | 地方当局通告 |
| LAC | L-Acetylcarnitine | L-乙酰基肉碱 |
| LAC | Looked After Child(ren) | 照看的孩子（人） |
| LAC | Loomis Armored Car | Loomis装甲车 |
| LAC | Lifetime Authorization Cards | 终身授权卡 |
| LAC | Long Arm Cast | 长臂铸造 |
| LAC | Liberian Agricultural Company | 利比里亚农业公司 |
| LAC | left anterio coronary | 左冠状动脉前叶 |
| LAC | la crosse virus | 拉克罗斯病毒 |
| LAC | Limited Access Control (Interstate and major highway operation system) | 有限访问控制（州际和主要公路运营系统） |
| LAC | Live and Active Cultures (yogurt) | 活菌和活菌（酸奶） |
| LAC | leukoderma acquisitum centrifugum | 离心性获得性白皮病 |
| LAC | labiocervical | 唇颈的 |
| LAC | left atrial contraction | 左心房收缩 |
| LAC | linguo-axiocervical | 舌轴颈的 |