viscosity

A measure of a fluid's resistance to flow — how "thick" or "sticky" it is. High viscosity means slow flow (honey); low viscosity means fast flow (water).

• viscous/ˈvɪskəs/(adj)粘稠的
• viscid/ˈvɪsɪd/(adj)粘性的

• high viscosity
• low viscosity
• viscosity of the fluid
• kinematic viscosity
• viscosity increases

1. 1.Honey has a viscosity roughly 10,000 times that of water, which is why it pours so slowly from a jar. (resistance to flow)
2. 2.Engine oil is graded by viscosity — 5W-30 flows easily in cold weather but maintains enough thickness to protect at high temperatures. (fluid thickness measure)

• thickness/ˈθɪknəs/— informal for high viscosity
• fluidity/fluːˈɪdɪti/— opposite — ease of flow

from Latin "viscosus" (sticky) — from "viscum" (mistletoe, birdlime) — the sticky substance from mistletoe used to trap birds