seco

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|rocketry}} {{acronym of|en|[[sustainer]] [[engine]] [[cutoff]]}}.
2. {{lb|en|rocketry}} {{acronym of|en|[[secondary]] [[engine]] [[cut-off]]}}.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.