| PLL | Phase Lock Loop | 相位锁定环 |
| PLL | poly-lysine | 多聚赖氨酸 |
| PLL | Phase Locked Logic | 相同步逻辑 |
| PLL | poly l lysine | 聚赖氨酸 |
| PLL | Paralegal Legal Litigator | 准法律诉讼人 |
| PLL | Ponta Pelada, AM, Brazil | 蓬塔佩拉达，AM，巴西 |
| PLL | Physical Link Layer (Optical Internetworking Forum) | 物理链路层（光互连论坛） |
| PLL | Plasma Lock Load | 等离子锁定负载 |
| PLL | Programmatic Lessons Learned | 程序性经验教训 |
| PLL | Prescribed Load List | 规定载荷列表 |
| PLL | Phased Locked Loop | 锁相环 |
| PLL | Potential Loss of Life (risk assessment) | 潜在生命损失（风险评估） |
| PLL | Pall Corporation | 颇尔公司 |
| PLL | plasmacytoid lymphocytic lymphoma | 浆细胞样淋巴细胞淋巴瘤 |
| PLL | polar lepromatous leprosy | 极地麻风 |
| PLL | Provision For Loan Loss | 贷款损失准备金 |
| PLL | preferred listening level | 首选听力水平 |
| PLL | Pre- Linked Library ( CA Clipper) | 预链接库（CA Clipper） |
| PLL | peripheral light loss | 外围光损失 |
| PLL | ProLymphocytic Leukaemia | 原淋巴细胞白血病 |
| PLL | Pollution Legal Liability | 污染法律责任 |
| PLL | Prolymphocytic Leukemia | 前淋巴细胞白血病 |
| PLL | Posterior Longitudinal Ligament | 后纵韧带 |
| PLL | Phase-Locked Loop | 锁相环 |
| PLL | Prescribed Load Listing | 规定荷载清单 |
| PLL | Partia Lëvizja e Legalitetit (Movement of Legality Party, Albania) | Partia Lëvizja e Legalitetit (Movement of Legality Party, Albania) |
| PLL | Phase Locked Loop | 锁相环 |
| PLL | Primary Load List (US DoD) | 主要载荷列表（美国国防部） |
| PLL | Permanent Logical Link | 永久逻辑链接 |
| PLL | Passenger Legal Liability (insurance) | 乘客法律责任（保险） |
| PLL | Polskie Linie Lotnicze (Polish Airways) | Polskie Linie Lotnicze（波兰航空公司） |
| PLL | Production Load List (US Army) | 生产负荷清单（美国陆军） |
| PLL | Preliminary Load List | 初步荷载清单 |
| PLL | Parts Load List | 零件载荷列表 |
| PLL | Parts List (TMINS) | 零件列表（TMINS） |
| PLL | Process Liquid Level | 工艺液位 |
| PLL | Prelinked Library (File Name Extension) | 预链接库（文件扩展名） |