What's the difference between earlock and oarlock?

Earlock

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Definition:

• (n.) A lock or curl of hair near the ear; a lovelock. See Lovelock.

Example Sentences:

Oarlock

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Definition:

• (n.) The notch, fork, or other device on the gunwale of a boat, in which the oar rests in rowing. See Rowlock.

Example Sentences:

• (1) Power (WO) was calculated from the force applied to the oarlock pin (FC) and its angular displacement (theta H).