検索、サーチのアイコン

<span class="dli-search"></span>

.dli-search {
  display: inline-block;
  vertical-align: middle;
  color: #333;
  line-height: 1;
  width: 0.7em;
  height: 0.7em;
  border: 0.1em solid currentColor;
  border-radius: 50%;
  box-sizing: content-box;
  position: relative;
}

.dli-search::before {
  content: '';
  position: absolute;
  top: calc(85.35534% + 0.07071em);
  left: calc(85.35534% + 0.07071em);
  width: 0.336em;
  height: 0.1em;
  background: currentColor;
  border-radius: 0 0.1em 0.1em 0;
  transform: translateY(-50%) rotate(45deg);
  transform-origin: left center;
}